FCC ID: YB2-CD903 CD903

User Manual of CD Walkman English NAME:CD903 MODEL: CDS9 Dear user:

Thank you for choosing a portable CD player from HOTT. We wish you have a happy experience, please read this manual carefully before use and keep this manual in a safe place for your use. Accessories:

CD Player Operation manual Power cable Audio cable Earphone Start-upSteps Key Function Description

: Turn on / Turn off Long-press for more than 3 seconds to turn on and play, long-press for more than 3 seconds to turn off when the back light is on

: Play / Pause Short-press to pause / play when playing.

: PREV / Fast backward Short-press for once to replay the song when playing, short-press for twice to skip to the previous track, long-press to fast backward

: DOWN / Fast forward Short-press to the next track when playing, long-press to fast forward.

: EQ sound effect / MP3 track area to select to play Short-press the order (BBS - mega bass)(POP - popular)(JAZZ - jazz)(ROCK -

rock)(CLASSIC - classic)(return to the original state). Long-press EQ key to skip to DIR track area tp select to play when playing. No CD disk track function, long-press EQ key without effect.

: Play mode Short-press the mode selection when playing: single cycle playing; ALL loop playback; DIR track area playing selection; INTRO browse playing; SHUF playing in random order and relieve the playing mode. (Note: All the play modes are applicable to MP3 disk, other play modes are applicable to CD disks except DIR track area.) FM transmitting function Double-click to enter FM transmission through to tune the frequency double-click to exit FM Bluetooth Functions Long-press to turn on the bluetooth device when playing, icon flickers to enter in the matching mode, it will match and connect with the surrounding bluetooth headset or bluetooth acoustics automatically within about 50s. Then long-press to switch and achieve the re-connection or bluetooth disconnection function, the matched device can turn on and connect automatically again. Back Function Introduction 1.HOLD (ON/OFF): lock / unlock the switch control (before starting up, you shall pull the key to OFF position). - ON: key lock - OFF: Unlock 2. Volume - / Volume +: Volume control switch can adjust the volume when playing. 3. Headset hole: Headset interface. 4. USB 5V: Power supply input. 5. Reset hole: Short-press to turn off. Charging Instructions:

Inspect that if the power supply and voltage on the power adapter board matches with the local power supply. 1. Insert the power adapter cable in >>USB 5V<< socket. 2. Insert the power adapter in the power supply socket.

- When charging, the red indicator is on. When it is fully charged, the blue indicator is on. It charges fully for 3-4 hours.

- If >>

run out.

<< flickers on the display screen, it means that the power of CD player will be Power input: USB ----5V 1A Output power: 20mW (32 dual track) Support the disc form: CD original edition disc, MP3 disc, CD-R, CD-RW;

Support the music form: CD-DA, MP3, WMA SNR: 75dB Degree of distortion: 1%

Charging period: 3-4 hours Playing period: 10 hours Machine dimension: 142X28mm Bluetooth transmitting distance: 10m Specifications and Parameters:

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This device and its antenna(s) must not be co-located or operating in conjunction with any other antenna or transmitter. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.

-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-- Consult the dealer or an experienced radio/TV technician for help. To maintain compliance with FCCs RF Exposure guidelines, This equipment should be installed and operated with minimum distance between 20cm the radiator your body: Use only the supplied antenna. FCC ID: YB2-CD903 Safety Precautions:

1.Be cautious to prevent from the excessive output power and avoid your listening injury when 2.Avoid to connect the moisture, rains, sand or all kinds of heat source, do not play the vases or other objects with liquids on the device. 3.Please clean it with slightly wet soft cloth when cleaning, do not clean with alcohol or setting the volume. benzene solution. 4.Please turn off the main power switch if not using for long time. 5.Please do not repair the device by yourself, it shall be assumed by users themselves if it is damaged by repairing by themselves. Matters Need Attention Please read and follow the instructions carefully in order to use the player correctly. Do not strike the host machine seriously. do not touch benzene, diluent or other chemical objects. Please do not close to the high-intensity magnetic field or electric field. Please keep away from the direct light or heating appliance. Please do not heat the battery or throw it in the fire. Please do not dismantle, repair, transform by themselves. When riding, driving a car or riding a motorcycle, please do not use the player and headset to Do not listen in large volume to avoid the bad influence of listening. Please classify and handle the waste package, battery and old electronic products properly. avoid danger. Important tip:

The disc with crackles may cause the player's malfunction, please do not use, if the disc signal side has the serious scratches, fingerprints or dirt, it may cause the player's malfunction or shorten the service life of laser head. U.S.A Service Center Toll-free: 1-866-486-8280(09:00-17:30) HOTT Corp: 13620 Benson Ave, Suite B Chino, CA 91710-5201 Germany Service Center Address: Rolf-Michael Pohl Klarenbergstrae 36 73525 Schwbisch Gmnd Email: info@hottaudio.com

F-6986 V1.2 PRODUCT SPECIFICATION Product NameBT Module Product modelF-6986 V1.0 Document NO.XZX-SPEC-BT-RD-028 Document versionV1.2 ISSUED DATE2018-6-26 Design Check Approvel Revision History F-6986 V1.2 Version Description Page Revised Issued dateE Design V1.0 V1.1 Original module The height of the package material of the 2018-04-17 Wudelong 2018-4-24 Wudelong V1.2 Bluetooth version upgraded from 4.2 to 5.0 2018-6-26 Liuxiongchao

Conent F-6986 V1.2 1. Product Overview.....................................................................................................4 2. Application areas..................................................................................................... 4 3. Basic characteristics................................................................................................ 4 4. Performance parameters......................................................................................... 5 5. Block Diagram.......................................................................................................... 5 Sixth, the module size diagram.................................................................................... 6 Seven, the height of the package material of the module............................................ 7 Eight, module pin definition diagram............................................................................ 8 Nine, pin function description........................................................................................9 Ten, circuit connection attention...................................................................................10 11. Matters needing attention.......................................................................................10 12. Recommended reflow temperature........................................................................ 11 13. Application schematic diagram............................................................................... 11 F-6986 V1.2 1. Product Overview:

The F-6986 Bluetooth module is an intelligent wireless audio data transmission product independently developed by the company. It is a low-cost and cost-effective stereo wireless transmission solution. The module uses the BK3266A chip QFN40 package design of BEKEN. The Bluetooth module adopts a drive-free mode. Customers only need to connect the module to the application product to quickly realize the wireless transmission of music, enjoy the fun of wireless music, and support simple data transmission functions. Support intelligent voice prompt and report function; integrated TF card playback function; integrated mobile U disk playback function; support internal LINE-IN; support internal MIC call; and support BT HOST to transmit AUX analog signal to other Bluetooth receiver products to achieve BT Launch function. 2. Application areas:

This module is mainly used for short-distance music transmission. It can be easily connected to the Bluetooth devices of digital products such as notebook computers, mobile phones, PDAs, etc. to realize wireless transmission of music. High-end Bluetooth audio Bluetooth stereo headset speakerphone Bluetooth wireless audio transmission Bluetooth data transmission application Support mobile internet peripherals Bluetooth Smart Speaker Bluetooth HOST launch product 3. Basic characteristics:

Bluetooth Profiles Bluetooth V5.0 specification support 9 mA average current for A2DP 0.8 uA deep sleep current Bluetooth 4.2 classic and low energy A2DP v1.3, AVRCP v1.6, HFP v1.7, HID v1.1, AVCTP v1.4, AVDTP v1.3, and SPP v1.2 True wireless stereo and two active link Two wires UART download interface 16 bits stereo ADC and DAC Stereo line in and dual microphone Five bands digital hardware equalizer SPI, UART, I2C, SDIO and USB F-6986 V1.2 DC3.3-4.2V A2DP v1.3, AVRCP v1.6, HFP v1.7, HID v1.1, AVCTP v1.4, AVDTP v1.3, and SPP v1.2 20mA

<500uA

-40C to +80C More than 10 meters I2S master and slave interface with MCLK output Interface for external PA and LNA Up to 220 mA battery charge controller 4. Performance parameters:

F-6986 Model Bluetooth specification Bluetooth V5.0 Supply voltage:

Support Bluetooth protocol Working current stand-by current temperature range Wireless transmission range:

Transmission power: CLASS24dbm Sensitivity:

Frequency Range:

External Interface:

Audio performance SBC Decoding Audio S/n:

Module size 5.Block diagram:

75dB 25 X 13.5 X 2mm Crystal 26MHz

-81dBm<0.1%BER 2.402GHz-2.480GHz SPI, UART, I2C, GPIO,SDIO and USB Antenna F-6986 SPI I2S ADC GPIO UART AUX_IN MIC AUDIO L R 6.Model Size F-6986 V1.2 7.The height dimensions of the packaging materials of the module:

F-6986 V1.2 8.Module pin definition diagram:

F-6986 V1.2 9.Pin function description:

Pin Symb GND 1 2 RF_OUT GND 3 4 GPIO14 5 6 7 8 9 10 GPIO5 GPIO4 GPIO15 NC NC TX 11 RX USB_DN/NC USB_DP/NC 12 13 14 GPIO8 15 GPIO9 16 GND 17 18 GPIO12_CMD NC I/O GND RF GND Digital I/O Digital I/O Digital I/O Digital I/O NC NC Digital I/O Digital I/O Digital I/O Digital I/O Digital I/O Digital I/O GND NC Digital I/O 19 GPIO10 20 GPIO13_SDO Digital I/O Digital I/O 21 GPIO11_CLK Digital I/O USB_DP USB_DN 22 23 24 GPIO2 25 GND 26 GPIO3 Digital I/O Digital I/O Digital I/O GND Digital I/O F-6986 V1.2 Description RF_GND RF_OUT / NC RF_GND GPIO14, JTAG_TDO/PWM5/ADC7/PCM_DOUT GPIO5,SPI_MISO//I2C_SDA GPIO4,SPI_MOSI//I2C_SCL GPIO15, Soft shut down and wake up

(active high) NC NC GPIO0, UART_TXD/I2C_SCL, Download port GPIO1, UART_RXD/I2C_SDA, Download port GPIO7, PWM1 / USBN./NC GPIO6, PWM0 / USBP./NC GPIO8, SD_CLK//SPI2_SCK GPIO9, SD_CMD/TX_EN/SPI2_MOSI Ground connect battery negative NC GPIO12,JTAG_TMS/PWM3/PCM_CLK/S D_CMD/

SPI2_MOSI GPIO10, SD_DATA0/RX_EN/SPI2_MISO GPIO13,JTAG_TDI/PWM4/ADC6/PCM_DI N/S D_DATA0/SPI2_MISO GPIO11,JTAG_TCK/PWM2/ADC4/PCM_S YNC/S D_CLK//SPI2_SCK GPIO6, PWM0 / USBP GPIO7, PWM1 / USBN GPIO2, SPI_CSN/ADC1/IrDA/Capture Time GND GPIO3, SPI_SCK/ADC2/CLKOUT F-6986 V1.2 27 28 LINR LINL 29 MICINA 30 MICINP 31 32 V2MICB1AS AUDIOLN AUDIOLP AUDIORP AUDIORN VUSB VBAT VCC3YS VCC3IO 33 34 35 36 37 38 39 40 GND AUX_INPUT AUX_INPUT MIC-NC MIC+

VMIC Audio output Audio output Audio output Audio output Power Power supply Power VCCSD GND LINR LINL Microphone input negative,/NC Microphone input positive Microphone reference voltage Audio left channel negative Audio left channel positive Audio right channel positive Audio right channel negative VUSB (4.7-5.2V) Power supply(3.3V-4.2V) 3.3V OUTPUT SD POWER GND 10. circuit connection note:

During the application of the module, please pay attention to avoid the influence of interference sources such as power amplifier, booster line, DC/DC circuit on the module, and avoid the power supply circuit of the module forming a series circuit with the high-power circuit unit to improve the SNR of the whole machine 11. Matters needing attention:

A. Regarding the use environment of wireless Bluetooth, wireless signals including Bluetooth applications are greatly affected by the surrounding environment, such as Obstacles such as trees and metals will absorb the wireless signal to some extent, so in practical applications, the distance of data transmission is affected to a certain extent. B. Since the Bluetooth module must be matched with the existing system, it is placed in the housing. Because the metal shell shields the radio frequency signal. So it is recommended not to install in a metal casing. C. PCB layout: The antenna part of the Bluetooth module is the PCB antenna. Since metal will weaken the function of the antenna, when laying the module, it is strictly forbidden to lay the ground and route under the module antenna. It is better if it can be hollowed out. D. In applications where the module is frequently powered, when ShutDowm is turned off, it can only be woken up by the GPIO15 pin of the module, and must be woken up at a high level:

12. Recommended Reflow Temperature F-6986 V1.2 Key features of the profile:

-Initial Ramp=1-2.5/sec to 175 equilibrium

-Equilibrium time=60 to 80 seconds

-Ramp to Maximum temperature (250)=3/sec Max

-Time above liquidus temperature(217): 45 - 90 seconds

-Device absolute maximum reflow temperature: 250

C5266091_X10_Ed.2

< HONGTIANTAI(H.K.)CO.,LIMITED>

Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Date: 2020/06/30 Subject: Request for Confidentiality FCC ID: YB2-CD903 To Whom It May Concern, Pursuant to the provisions of Sections 0.457 and 0.459 of Commission's rules

(47CFR0.457, 0.459), we are requesting the Commission to withhold the following attachment(s) as confidential document from public disclosure. Exhibits Long-Term Confidentiality Short-Term Confidentiality NOTE 2 ID Label/Location Attestation Statement External Photos Block Diagram Schematics Test Report Test Setup Photos Users Manual Internal Photos Parts List / Tune Up RF Exposure Info Operational Description Cover Letter(s) SDR Software / Security Info No No No No No No No NOTE 1 NOTE 1 No No No No No No NOTE 1: Long-Term Confidentiality may be permitted under special conditions (See II. LONG-TERM CONFIDENTIALITY, Section 3 of KDB 726920, use last in force) NOTE 2: Short-Term Confidentiality can be requested for a maximum of 180 days from the date of the grant. Above mentioned document contains detailed system and equipment description are considered as proprietary information in operation of the equipment. The public disclosure of above documents might be harmful to our company and would give competitor an unfair advantage in the market. In case of short-term Confidentiality, the applicant requests the exhibits selected above are withheld from public view for a period of __180____ days from the date of the Grant of Equipment Authorization and prior to marketing. It is our understanding that all measurement test reports, FCC ID label format and correspondent during certification review process cannot be granted as confidential documents and those information will be available for public review once the grant of equipment authorization is issued. Sincerely, 1/1 C5266091_X10_Ed.2 Signature:

Name: Wenjin Fan Title: Manager 1/1

HONGTIANTAI(H.K.)CO.,LIMITED Family models declaration letter. 2020/06/30 We HONGTIANTAI(H.K.)CO.,LIMITED Of 2102Pakpolee Commercial Centre 1A Sai Yeung Choi Street South Monqkok Kowloon Hong Kong Sar Hong Kong, China FCC ID: YB2-CD903 Model Name: CDS9 Family Model: CD903TF, CD903SDW, HC031, CD903T, HC032, CD903SDU, HC028, CDS4 All models are the same circuit and RF module, except the model name and the last three models(HC032, CD903SDU, HC028, CDS4) have no FM transmission function

(common board). Thanks Sincerely, Signature Name: Wenjin Fan Title: Manager Email: ge@hott.net.cn

C5266091_X8_Ed.1 Letter of Authorization

< HONGTIANTAI(H.K.)CO.,LIMITED >

Company: HONGTIANTAI(H.K.)CO.,LIMITED Address: 2102Pakpolee Commercial Centre 1A Sai Yeung Choi Street South Monqkok Kowloon Hong Kong Sar Hong Kong, China Product Name: CD903 Model Number(s): CD903TF, CD903SDW, HC031, CD903T, HC032, CD903SDU, HC028, CDS4 Product Description: CD903 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Wenjin Fan Title: Manager Date: 2020/06/30 Signature of applicant:

1/1