FCC ID: 2AK8Q-HWD01888 Wireless Remote Control Doorbell

W ireless Rem ote Co ntrol Doorbell T ech nical Specificatio ns Receiver Re m ote C o ntrol A C 1 0 0 V ~ 2 4 0 V 5 0 H z ~ 6 0 H z B attery D C 3 V (C R 2 0 32*1) R L-38 8 3 V ersion1.0 P a c k a g e C o nte nts P ackage Co ntents: Receiver1, Re m ote Control1, 3 M sticker x1, Battery (C R 2032)1 Receiver Re m ote Control W ork m ode C hi m e S election/Pair V olu m e A djust m e nt

/Clear Code Indicator S o u n d-

R e producing button Indicator Installin g the R e m o t e C o ntrol:

1 2 3 1. R e m o v e the insulation she et fro m th e back of the unit. 2. P aste the 3 M sticker sup plied on the back of the unit. 3. P aste the unit on the w all or door. Instructions 1. Select W ork M o d e: Press "

2. C hi m e Selection: Press "

3. Volu m e A djust m e nt: Press "

levels for option. as hing light/Chi m e without ashing light/Chi m e with ashing light.

" to choose the w ork m o d e. There are three m o d es for option: Silient with

" on the side of the receiver to play the next chi m e. 38 of chi m e quantity for option.

" on the side of the receiver to adjust the volu m e. Silent/ High/ M e diu m/Lo w 4. Pairing: Long press "

" on the side of the receiver for over 3 seconds, it will sound "Ding- Don g" to indicate that it has entered into the pairing state. No w, press the Sound- R eproducing button on the re m ote control, when the receiver sounds the chi m e selected, the pairing is successful(Follo w the instruction to pair one re m ote control to the receiver. To pair m ore, repeat the instruction. Max 20 re m ote controls can be paired to one receiver

" on the side of the receiver for over 5 seconds, it will sound "Ding- Do ng, 5. Clearing C o d e: Long press "

Ding- Do n g" to indicate that clearing code is successful (This action will clear the code for all re m ote controls). 6. Po w er Indicator: If the receiver is pow er on for the rst time, it will sound "Ding-Dong, Ding-Dong" to indicate that connecting to po wer supply works well. 7. Indicator Light: W hen the receiver plays a chord, the indicator on its front will ash in accordance with the chord. W hen pressing the Sound-Reproducing button on the re m ote control, the indicator light on the re m ote control will be on. Standby Current

< 2 u A W orking Current

< 4 0 m A Trans mitting Po w er 3d B m Trans mitting Ti me 2s/trans mission A ntenna Gain

-2~3d Bi W orking Te m perature -10~50 P o w er Standby Po w er C o nsu m ption W orking Po w er C o nsu m ption 0.5 W 1 W Lo w: 60-70d B High: 80-90d B V olu m e (30c m) M e diu m: 70-80d B D e m o dulation F S K Frequency Distance 433.92 M H z250 K Hz 150 m( O pen Area) R e ceiving Sensitivity

-115d B m W orking Te m perature

-10~50 F C C State m e nt W arning: Chan ges or m odications to this unit not expressly approved by theparty responsible for co m pliance could void the user's authority to operate theequip m ent. N O T E: This equip m e nt has been tested and found to co m ply with the limits fora Class B digital device, pursuant to Part 15 of the FC C Rules. These limits aredesigned to provide reasonable protection against har mful interference in aresidential installation. This equip ment generates, uses and can radiate radiofrequency energy and, if not installed and used in accordance with theinstructions, m ay cause har mful interference to radio co m m u nications. H o wever, there is no guarantee that interference will not occur in a particularinstallation. If this equip ment does cause har mful interference to radio ortelevision reception, which can be determined by turning the equip ment off andon, the user is encouraged to try to correct the interference by one or more of the following measures:

R eorient or relocate the receiving antenna. Increase the separation between the equip me nt and receiver. C onnect the equip ment into an outlet on a circuit different fro m that to whichthe receiver is connected. C onsult the dealer or an experienced radio/TV technician for help The device must not be co-located or operating in conjunction with any other antenna or trans mitter. T his device co m plies with Part 15 of the FC C R ules. O p eration is subject to the follo wing two conditions :

(1) this device m ay not cause har mful interference, and

(2) this device m ust accept any interference received, including interference that m a y cause undesired operation. 1 2

Label size: 45mm*15mm Lable location On the back of the product The back of the product size: 45mm*15mm

Tel: 408-526-1188 Fax: 408-526-1088 Email: sales.eaw@us.bureauveritas.com 775 Montague Expressway Milpitas, CA 95035 Project and Product Certification Representative Authorization Letter Reason for Amendment (current / obsolete) Initial Release (obsolete) Revised wording (obsolete) Updated company template (obsolete) Updated letter information (obsolete) Added FCC ID field (obsolete) Updated company name & logo (current) Revision History From 1.0 1.0 2.0 3.0 4.0 5.0 To 1.0 2.0 3.0 4.0 5.0 6.0 Approved Date Nov-14-2006 Sept25-2007 Jan-31-2012 May-23-2014 Sep-16-2014 Jun-27-2018 SCS-F18: Project and Product Certification Representative Authorization Letter Page 1 of 2 Rev 6.0 SHENZHEN UNICHAIN TECHNOLOGY CO., LTD 2019.10.8 To: BVCPS, INC. 775 Montague Expressway, Milpitas, CA 95035 USA Dear Sir/Madam, Re: Product Certification Representative Authorization Letter We, _____ SHENZHEN UNICHAIN TECHNOLOGY CO., LTD _____ hereby authorize Bureau Veritas Consumer Product Services, Inc. to act as a Certification Body for certifying for the following project(s):

FCC ID: 2AK8Q-HWD01888 Product Description: Wireless Remote Control Doorbell Model: HWD01888, RL-3883, RL-2R3883, HWD01878, RL-3883B, HWD01898, RL-2R3883B, HWD01899 Sincerely, Clients signature Clients name: Reg Li Title: Engineer Contact information / address: 3 Floor, HongXiangJia electronic commerce Pioneer Park, Shenzhen, China SCS-F18: Project and Product Certification Representative Authorization Letter Page 2 of 2 Rev 6.0

SHENZHEN UNICHAIN TECHNOLOGY CO., LTD 2019.12.16 To: BVCPS, INC. 775 Montague Expressway, Milpitas, CA 95035 USA Dear Sir/Madam, Re: Declaration of Model difference We, _____ SHENZHEN UNICHAIN TECHNOLOGY CO., LTD _____ hereby authorize Bureau Veritas Consumer Product Services, Inc. to act as a Certification Body for certifying for the following project(s):

FCC ID: 2AK8Q-HWD01888 Product Description: Wireless Remote Control Doorbell Model: HWD01888, RL-3883, RL-2R3883, HWD01878, RL-3883B, HWD01898, RL-2R3883B, HWD01899 All of the model only difference of the model name use for trade purpose and with different quantities of the same model products for sale. Wireless Remote Control Doorbell System model name definition (With TX and RX) as below:

Wireless Remote Control Doorbell System model name definition Marketing and

(With TX and RX) users use matching Models difference and note Applicant Model Market Model programs name RL-3883 Name HWD01878 RL-2R3883 HWD01888 RL-3883B HWD01898 RL-2R3883B HWD01899 1TX+1RX 1TX+2RX 2TX+1RX 2TX+2RX 1. Difference of the model name use for trade purpose. 2.Different quantities of the same model products for sale Sincerely, Clients signature Clients name: Reg Li Title: Engineer Contact information / address: 3 Floor, HongXiangJia electronic commerce Pioneer Park, Shenzhen, China SCS-F18: Project and Product Certification Representative Authorization Letter Page 1 of 1 Rev 6.0

775 Montague Expressway Milpitas, CA 95035 Tel: 408-526-1188 Fax: 408-526-1088Email:

sales.eaw@us.bureauveritas.com Confidentiality Request Letter Reason for Amendment (current / obsolete) Initial Release (obsolete) Adding CFR 2.459 (obsolete) Updated company template& Added text box

(obsolete) Added IC confidentiality letter form (obsolete) Corrections to STC form. Added reference to KDB

(obsolete) Updated company logo (current) Revision History From 1.0 1.0 2.0 3.0 4.0 5.0 To 1.0 2.0 3.0 4.0 5.0 6.0 Approved Date Nov-14-2006 August 11 - 2008 Jan-31-2012 March-26-2015 Nov-19-2015 Jun-26-2019 SCS-F19: Confidentiality Request Letter Page 1 of 3 Rev 6.0 Shenzhen Apeman Innovations Technology Co.,Ltd 2019.12.15 To:

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD Subject: Permanent Confidentiality Request for FCC ID: 2AK8Q-HWD01888 Pursuant to sections 0.457 and 0.459 of CFR 47, we respectfully request permanent confidential treatment of the following Exhibits accompanying this application as:

- Block Diagram

- Schematics

- Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Clients signature Clients name: Reg Li Title: Engineer Contact information / address: 3 Floor, HongXiangJia electronic commerce Pioneer Park, Shenzhen, China SCS-F19: Confidentiality Request Letter Page 2 of 3 Rev 6.0 Shenzhen Apeman Innovations Technology Co.,Ltd 2019.12.15 To: Federal Communications Commission Office of Engineering and Technology Equipment Authorization Division 7345 Oakland Mills Road Columbia, Maryland 21046 Subject: Short Term Confidentiality Request for FCC ID: 2AK8Q-HWD01888 To Whom It May Concern:

Pursuant to sections 0.457 and 0.459 of CFR 47, and to avoid premature release of sensitive information prior to marketing or release of the product to the public, the applicant requests the following documents contained in this certification application be temporarily withheld from public disclosure for an initial period of 45 days;

or for a specified date of not to exceed 180 days from the Grant Date. See KDB 726920. or 180

Internal Photos

- User Manual

- Test Setup photos External Photos

The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. Sincerely, Clients signature Clients name: Reg Li Title: Engineer Contact information / address: 3 Floor, HongXiangJia electronic commerce Pioneer Park, Shenzhen, China SCS-F19: Confidentiality Request Letter Page 3 of 3 Rev 6.0