Boya BY-WM4 Pro K5 2.4GHz Mic Android 1+1

 RF Modulation:

 GFSK (Gauss Frequency Shift Keying)

 Frequency Band:

 2.4GHz (2405 - 2478MHz)

 Frequency response:

 35Hz - 14KHz±3dB

 Signal/Noise:

 84dB or more

 Distortion:

 0.05% or less (32Ω,1 KHz, 65mW output)

 RF output level:

 3mW

 Earphone output level:

 32Ω, 65mW

 Reception sensitivity:

 -90dB +/- 3dB / 0dB=1V/Pa, 1kHz

 Audio input connector:

 3.5mm Mini Jack

 Operation range:

 60m (197ft) (without obstacle)

 Power requirements:

 BY-WM4 PRO RXU:
 Supplied by USB Type-C Device

 Plug:

 BY-WM4 PRO RXU: USB Type-C   Connector

 Consumption power:

 Transmitter: 3V/70mA

 Receiver: 3V/70mA

 Dimensions:

 Receiver: BY-WM4 PRO RXU:   
 82 × 30.7 × 12mm (3.2 × 1.2 × 0.5")

 Transmitter: 45 x 70 x 35mm (1.8 x 2.8 x   1.4")

 Weight:

 Receiver:
 BY-WM4 PRO RXD: 12g (0.4oz)  

 Transmitter: 47g (1.7 oz)