Audio Technica ATH-M20 BT Series

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Specifications
Headphones
Type
Closed-back dynamic
Driver
40 mm
Sensitivity
100 dB/mW
Frequency response
5 to 32,000 Hz
Impedance
36 ohms
Microphone
Type
Electret condenser
Polar pattern
Omnidirectional
Sensitivity
-42 dB (1 V/Pa, at 1 kHz)
Frequency response
50 to 20,000 Hz
Communication specifications
Communication system
Bluetooth version 5.0
Maximum RF output
10 mW EIRP
Maximum communication
range
Line of sight - approx. 10 m (33')
Frequency band
2.402 GHz to 2.480 GHz
Modulation method
GFSK, Pi/4DQPSK, 8DPSK
Spread spectrum method
FHSS
Compatible Bluetooth profiles
A2DP, AVRCP, HFP, HSP
Supported codec
AAC, SBC
Supported content protection
method
SCMS-T
Transmission band
20 to 20,000 Hz