FCC ID: 2AQZH-MM531S23 3-in-1 Wireless Charger with MagSafe

Wireless charger SAFETY INFORMATION This product is safe for regular use under normal conditions. As with any device using electrical power, some situations may be unsafe and injuries or damages could result. To minimize or avoid unsafe conditions, read and follow the instructions before using. Avoid dropping. Do not disassemble. Do not place metal objects between devices and the wireless charging pads. Thick protective case ( .2 in. [5 mm]) or a case that includes a magnet or metallic material, may not allow proper charging function. Keep wireless charging pad away from any liquid or moisture. The maximum ambient temperature during use of this product must not exceed 104 F (40 C). Do not place this device in _re or other excessively hot environments. Must use provided adapter for proper function, if not it may malfunction. This product is intended for home office use. For indoor use only. Consult local staff before using the product near medical or industrial equipment or on board an aircraft. Prevent cables from being pinched or damaged. A damaged cable or device may malfunction and/or overheat. (Fire hazard). Unplug the product if not used for an extended period of time. WARNING:

People with pacemakers should keep away from the magnets. The magnets can negatively affect the function of the pacemaker. Do not place any bank or similar cards with magnetic strips or magnetically sensitive objects on the product. The data on the cards could be damaged or completely deleted. Ensure that there are no metal parts on the back of your device. Metal heats up significantly in the field of an induction charger and can damage your device and/or the charger. LEGAL NOTICES FCC compliance 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. FCC Caution:

Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. FCC Statement:

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 o_ 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. RF Exposure: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. RSS-Gen statement:

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-

exempt RSS(s). Operation is subject to the following two conditions:

1. This device may not cause interference. 2. This device must accept any interference, including interference that may cause undesired operation of the device. Ce dispositif contient des metteurs exonrs de permis(s)/rcepteurs)s qui sont conformes aux RSS (s) exempts de licence du Canada. Lopration est soumise aux deux conditions suivantes :

1. Cet appareil peut ne pas causer dinterfrences. 2. Ce dispositif doit accepter toute interfrence, y compris les interfrences qui peuvent provoquer un fonctionnement indsirable de lappareil. RSS-102 Statement This equipment complies with IC RSS_102 radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body. Cet quipement est conforme aux limites d'exposition aux radiations IC CNR_102 tablies pour un environnement non contrl. Cet quipement doit tre install et utilis avec une distance minimale de 20 cm entre le radiateur et votre corps. Responsible party:

Best Buy Purchasing, LLC. 7601 Penn Ave South, Richfield, MN 55423 U.S.A. 1-877-467-4289. (U.S. and Canada)

Date: ___2022-07-11_____ Subject: Confidentiality Request for FCC ID: 2AQZH- MM531S23 and IC: 28726-MM531S23 Pursuant to FCC 47 CRF 0.457(d) and 0.459 and IC RSP-100, Section 10, the applicant requests that a part of the subject FCC/IC application be held confidential. Type of Confidentiality Requested Short Term Short Term Short Term Short Term Short Term Short Term Short Term Short Term Permanent Permanent Permanent Permanent Permanent Permanent n/a n/a Exhibit Block Diagrams Internal Photos ***

Operation Description/Theory of Operation Tune-Up Procedure/ Parts list Schematics Users Manual***

Test Setup External Photos Gopod Group Limited.. has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality:

The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public. (*** PAG only) Short-Term Confidentiality:

The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of ___( 180) ___ days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify TUV Rheinland in the event information regarding the product or the product is made available to the public. TUV Rheinland will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04-1705. Sincerely, By:

____________________________________ Mary Liu / Sales Director. _______

(Signature/Title)

(Print name) MS-0044715 Page 1 of 1 Revision 0

Difference Declaration Original Model No.: NS-MM531S23 Adding Model No. : NS-MM531xxxxxxxx, BE-MM531xxxxxxxx

(x=0-9, A-Z, a-z, - or blank, for market purpose only, To whom it may concern, We, Gopod Group Limited. would like to declare those models NS-

MM531S23, NS-MM531xxxxxxxx, BE-MM531xxxxxxxx are identical in electrical circuit design and PCB layout.The only difference are model number or color for different market purpose. Sincerely yours, Applicant

: Gopod Group Limited. 6/F., 235 Wing Lok Trade Centre, Sheung Wan, Hong Kong, China Address Signature

Name and title

: Mary Liu / Sales Director Email Tel.

: mary@gopod.cc

: 86-755-82807722

The outline of working principle:

The wireless charging system is composed of a transmitting unit (see the transmitting unit block diagram) and the receiving unit. It is based on the QI (WPC 1.2.4) standard using near-field electromagnetic coupling and the power carrier amplitude modulation method to implement power transmission between the transmitting and receiving units;

The receiving unit receives the power electromagnetic energy transmitted by the transmitting unit and converts it into a DC current output to the power consumption part, and the receiving unit determines whether the received power requirement is met by detecting and calculating the received voltage and current, and converting the requirements into signal modulation on the power carrier, the transmitting unit returns the signal of the carrier amplitude change to the communication digital signal to the main control chip of the receiving unit, and the main control chip adjusts the output power according to the received information until meet power requirements at the receiving end;

After the wireless charger transmits part, in a short period of time, the main control chip completes the communication between the self-test and the power adapter, determines the power range that can be output, and then starts sending the detection signal to the load: such as the detection signal the full bridge power and the PIN information. The control chip sends a PIN control signal to part ,converting it into the electromagnetic power carrier , and if there is no load, it is sent intermittently;

When there is load, the load receives the power electromagnetic energy and responds to the information according to the requirements of the QI standard. The information is modulated on the power carrier by the receiving coil. The modulation of the receiving end causes a slight amplitude change of the voltage amplitude of the power carrier. [Signal detection and filtering] part detect part of the signal and send it to the [voltage demodulation] part to restore the digital signal that can be recognized by the main control chip to the [master chip] part; and the other signal outputted by

[Signal Detection and Filtering] part is directly sent to the [main control chip] part,and the auxiliary control main control part further completes the control of power transmission; the

[voltage adjustment] part is for adjusting the voltage of the receiving part to adapt to more different types of loads; The input current is collected by the current sampling resistor to collect the input current after sending to the [current amplification] part amplified and sent to the [main control chip] part for input power calculation; At the same time, the current modulation part is sent to the [main control chip] part after demodulation and together with the voltage signal transfer the communication information to the [main control chip] part, so that the [main control chip] part can achieve accurate control and effectively transfer the required power to the receiving part;

[LDO Voltage Regulation] part supplies power to the parts which need it of the whole machine;

[Input voltage detection] part: Collecting input voltage;

[Voltage Adaptation Network] part is used to contact the adapter and adjust the output power;

[Main temperature detection] part: This part can be not needed, in QI wireless charging there can have a better detection method to detect FOD, unless the customer must need, generally it can be not added;

[Status indication] Part: Used to indicate the working status of the charging system. Brief description of working principle 1, This product is an Apple watch wireless charging with USB cable connector. 2, MCU output the fixed frequency 326.5KHz PWM wave, this wave form is loaded into the LC circuit by MOS driver and MOS, the coil emit electromagnetic wave oscillation;

3, if the apple watch presented, the coil receives electromagnetic waves, transform to electricity then to make the receiving chip enabled, chip sends packets after enabled, in the form of electromagnetic waves through the electromagnetic induction principle between the two coils back to the transmitter ;

4, the transmitter coil receivers packets, through the current or voltage detection, then through filter shaping, operational amplifier and so on processing the communication code parsing to MCU, MCU communication code analysis, according to the solution, the code to make the corresponding action, such as shaking hands, identification, configuration, emissions energy and adjust energy.