According to §15

Benjamin

RF Exposure Info

Shenzhen Amesra Technology Co., Ltd. M2R 2A4RO-M2R 2A4ROM2R m2r

Shenzhen Amesra Technology Co., Ltd. M2R Wireless Audio Receiver 2A4RO-M2R 2A4ROM2R m2r

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Document DEVICE REPORTGetApplicationAttachment.html?id=8197864 
Shenzhen CTB Testing Co., Ltd.

FCC ID:2A4RO-M2R

Portable device

According to §15.247(e)(i) and §1.1307(b)(1), systems operating under the provisions of this

section shall be operated in a manner that ensures that the public is not exposed to radio

frequency energy level in excess of the Commission's guidelines.

According to KDB447498 D01 General RF Exposure Guidance V06

The 1-g SAR and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation

distances  50 mm are determined by:

[(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance,

mm)]·[f(GHZ)]  3.0 for 1-g SAR and  7.5 for 10-g extremity SAR, where:

·

f(GHZ) is the RF channel transmit frequency in GHz

·

Power and distance are rounded to the nearest mW and mm before calculation

·

The result is rounded to one decimal place for comparison

When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to

determine SAR test exclusion.

EDR:

Conduct

Max

Channel ed Conducte Tune-up tune-up

Modulation Freq. power d power power power

(GHz) (dBm) (mW) (dBm) (dBm)

Max tune-up power (mW)

Result SAR

Distance (mm)

calculatio

Exclusion

n

threshold

SAR test exclusion

2.402 0.229 1.05

0±1 1.00

1.26

<5

0.39023

3.00

YES

GFSK 2.441 0.914 1.23

0±1 1.00

1.26

<5

0.39338

3.00

YES

2.480 0.381 1.09

0±1 1.00

1.26

<5

0.39651

3.00

YES

2.402 0.899 1.23

0±1 1.00

1.26

<5

0.39023

3.00

YES

 /4DQPSK

2.441

1.566

1.43

1±1 2.00

1.58

<5

0.49524

3.00

YES

2.480 1.066 1.28

1±1 2.00

1.58

<5

0.49918

3.00

YES

2.402 1.277 1.34

1±1 2.00

1.58

<5

0.49127

3.00

YES

8DQPSK 2.441 1.914 1.55

1±1 2.00

1.58

<5

0.49524

3.00

YES

2.480 1.336 1.36

1±1 2.00

1.58

<5

0.49918

3.00

YES

BLE:1M

Conduct

Max

Channel ed Conducte Tune-up tune-up

Modulation Freq. power d power power power

(GHz) (dBm) (mW) (dBm) (dBm)

Max tune-up power (mW)

Result SAR

Distance (mm)

calculatio

Exclusion

n

threshold

SAR test exclusion

2.402 0.268 1.06

0±1 1.00

1.26

GFSK 2.44 0.728 1.18

0±1 1.00

1.26

2.480 0.227 1.05

0±1 1.00

1.26

<5

0.39023

3.00

<5

0.39330

3.00

<5

0.39651

3.00

YES YES YES

BLE:2M

Conduct

Max

Channel ed Conducte Tune-up tune-up

Modulation Freq. power d power power power

(GHz) (dBm) (mW) (dBm) (dBm)

Max tune-up power (mW)

Result SAR

Distance (mm)

calculatio

Exclusion

n

threshold

SAR test exclusion

2.402 0.248 1.06

0±1 1.00

1.26

GFSK 2.44 0.806 1.20

0±1 1.00

1.26

2.480 0.255 1.06

0±1 1.00

1.26

<5

0.39023

3.00

<5

0.39330

3.00

<5

0.39651

3.00

YES YES YES

Conclusion: For the max result : 0.49918 FCC Limit 3.0 for 1g SAR.

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