MPE Report

Report No.: STS2503024H01

Issued for: Shenzhen Monster Creative Technology Co., Ltd.

Room 1602, Building A, Fencheng Zhigu Building, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China

Product Details

Product Name:	BLUETOOTH HEADPHONE
Brand Name:	MONSTER
Model Name:	MH22201
Series Model(s):	E57
FCC ID:	2AVD2-MH22201
Test Standards:	FCC 47CFR §2.1093

The test results presented in this report relate only to the object tested. This report shall not be reproduced, except in full, without the written approval of the ShenZhen STS Test Services Co., Ltd.

Test Summary

Applicant's Name:	Shenzhen Monster Creative Technology Co., Ltd.
Manufacturer's Name:	Shenzhen Monster Creative Technology Co., Ltd.
Address:	Room 1602, Building A, Fencheng Zhigu Building, Xixiang Street, Bao'an District, Shenzhen, Guangdong, China
Date of Test:	05 Mar. 2025
Date of receipt of test item:	05 Mar. 2025
Date(s) of performance of tests:	05 Mar. 2025 ~ 17 Mar. 2025
Date of Issue:	17 Mar. 2025
Test Result:	Pass

Testing Engineer: Aaron Bu

Technical Manager: Tony Liu

Authorized Signatory: Bovey Yang

Revision History

Rev.	Issue Date	Report No.	Effect Page	Contents
00	17 Mar. 2025	STS2503024H01	ALL	Initial Issue

1. GENERAL INFORMATION

1.1 GENERAL DESCRIPTION OF THE EUT

Product Name:	BLUETOOTH HEADPHONE
Brand Name:	MONSTER
Model Name:	MH22201
Series Model(s):	E57
Model Difference:	Only the model names are different
Product Description:	The EUT is BLUETOOTH HEADPHONE
Operation Frequency:	2402-2480 MHz
Modulation Type:	BT BR(1Mbps): GFSK BT EDR(2Mbps): π/4-DQPSK BT EDR(3Mbps): 8DPSK
Antenna Designation:	PCB
Antenna gain:	-0.59dBi
Power Rating:	Input: DC 5V 1A
Adapter:	N/A
Battery:	Rated Voltage:3.7V Charge Limit Voltage:4.2V
Hardware Version:	H01-7003F4 V1.0
Software Version:	H01_7006F4_V138

1.2 TEST FACTORY

SHENZHEN STS TEST SERVICES CO., LTD

Add.: 101, Building B, Zhuoke Science Park, No.190 Chongqing Road, ZhanChengShequ, Fuhai Sub-District, Bao'an District, Shenzhen, Guang Dong, China

FCC test Firm Registration Number: 625569

IC test Firm Registration Number: 12108A

A2LA Certificate No.: 4338.01

2. FCC 47CFR §2.1093 REQUIREMENT

2.1 TEST STANDARDS

Follow the maximum permissible exposure (MPE) limits specified in 447498 D04 Interim General Radio Frequency Exposure Guidelines v01. The gain of the antenna used in the product was extracted from the supplied antenna data sheet and the maximum total power input to the antenna was also measured. Calculate the distance from the product to the MPE limit by the formula.

2.2 LIMIT

For single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if:

(A) The available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A);

(B) Or the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by:

Pth (mW) = $\begin{cases}
\text{ERP}_{20 \text{ cm}} \left( \frac{d}{20 \text{ cm}} \right)^x & d \leq 20 \text{ cm} \\
\text{ERP}_{20 \text{ cm}} & 20 \text{ cm} < d \leq 40 \text{ cm}
\end{cases}$

Where

$x = -\log_{10}\left( \frac{60}{\text{ERP}_{20 \text{ cm}}} \right) \text{ and } f \text{ is in GHz};$

and

$\text{ERP}_{20 \text{ cm}} (\text{mW}) = \begin{cases}
\frac{(2040 f)^{0.68}}{0.3 \text{ GHz} \leq f < 1.5 \text{ GHz}} \\
\frac{(3060 f)^{0.68}}{1.5 \text{ GHz} \leq f \leq 6 \text{ GHz}}
\end{cases}$

d = the separation distance (cm);

(C) Or using below table and the minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. For the exemption in Table 1 to apply, R must be at least λ/2π, where λ is the free-space operating wavelength in meters. If the ERP of a single RF source is not easily obtained, then the available maximum time-averaged power may be used in lieu of ERP if the physical dimensions of the radiating structure(s) do not exceed the electrical length of λ/4 or if the antenna gain is less than that of a half-wave dipole (1.64 linear value).

RF Source frequency (MHz)	Threshold ERP(watts)
0.3-1.34	1,920 R².
1.34-30	3,450 R²/f².
30-300	3.83 R².
300-1,500	0.0128 R²f.
1,500-100,000	19.2R².

For multiple RF sources: Multiple RF sources are exempt if:

(A) The available maximum time-averaged power of each source is no more than 1 mW and there is a separation distance of two centimeters between any portion of a radiating structure operating and the nearest portion of any other radiating structure in the same device, except if the sum of multiple sources is less than 1 mW during the time-averaging period, in which case they may be treated as a single source (separation is not required). This exemption may not be used in conjunction with other exemption criteria other than those is paragraph (b)(3)(i)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(i)(A).

(B) in the case of fixed RF sources operating in the same time-averaging period, or of multiple mobile or portable RF sources within a device operating in the same time averaging period, if the sum of the fractional contributions to the applicable thresholds is less than or equal to 1 as indicated in the following equation.

$\sum_{i=1}^{a} \frac{P_{t}}{P_{t h, i}} + \sum_{j=1}^{b} \frac{E R P_{j}}{E R P_{t h, j}} + \sum_{k=1}^{c} \frac{\text { Evaluated }_{k}}{\text { Exposure Limit }_{k}} \leq 1$

Where:

a = number of fixed, mobile, or portable RF sources claiming exemption using paragraph (b)(3)(i)(B) of Part 1.1307 for Pth, including existing exempt transmitters and those being added.

b = number of fixed, mobile, or portable RF sources claiming exemption using paragraph (b)(3)(i)(C) of Part 1.1307 for Threshold ERP, including existing exempt transmitters and those being added.

c = number of existing fixed, mobile, or portable RF sources with known evaluation for the specified minimum distance including existing evaluated transmitters.

Pi = the available maximum time-averaged power or the ERP, whichever is greater, for fixed, mobile, or portable RF source i at a distance between 0.5 cm and 40 cm (inclusive).

Pth,i = the exemption threshold power (Pth) according to paragraph (b)(3)(i)(B) of this section for fixed, mobile, or portable RF source i.

ERPj = the ERP of fixed, mobile, or portable RF source j.

ERPth,j = exemption threshold ERP for fixed, mobile, or portable RF source j, at a distance of at least λ/2π according to the applicable formula of paragraph (b)(3)(i)(C) of Part 1.1307.

Evaluatedk = the maximum reported SAR or MPE of fixed, mobile, or portable RF source k either in the device or at the transmitter site from an existing evaluation at the location of exposure.

Exposure Limitk = either the general population/uncontrolled maximum permissible exposure (MPE) or specific absorption rate (SAR) limit for each fixed, mobile, or portable RF source k, as applicable from § 1.1310.

2.3 TEST RESULT

Tune up

GFSK (Peak)

Channel	Channel 0	Channel 39	Channel 78
Target (dBm)	1.81	1.5	1.72
Tolerance ±(dB)	1.0	1.0	1.0

π/4DQPSK (Peak)

Channel	Channel 0	Channel 39	Channel 78
Target (dBm)	2.66	2.33	2.55
Tolerance ±(dB)	1.0	1.0	1.0

8DPSK (Peak)

Channel	Channel 0	Channel 39	Channel 78
Target (dBm)	3.01	2.67	2.89
Tolerance ±(dB)	1.0	1.0	1.0

Protocol	Fre. (GHz)	Separation distance (cm)	Max Tune Up (dBm)	Max Tune Up Power (mW)	Limit (mW)	Ratio	Result
BT	2.480	0.5	4	2.512	2.72	0.9244	Pass

Note:

The Maximum power is less than the limit, complies with the exemption requirements.
ERP = EIRP - 2.15

※※※※※END OF THE REPORT ※※※※※

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