BOYA BY-WM4 PRO-K4 2.4G Wireless Microphone System

Specifications:
RF Modulation: GFSK (Gauss Frequency Shift Keying)
Frequency band: 2.4G (2405-2478MHz)
Frequency response: 35Hz-14KHz±3dB
Signal/Noise: 84dB or more
Distortion: 0.05% or less (32ohm, 1KHz, 65mW output )
FR output level: 3mW
Earphone output level: 32hom, 65mW
Reception sensitivity: -90dB+/- 3dB / 0dB=1V/Pa, 1KHz
Audio input connector: 3.5mm mini jack
Operation range: 60m (197 ft)(without obstacle)
Transmitter Power requirement: 2 * AAA battery(not included)
Consumption power: Transmitter: 3V/70mA
                   Receiver: 3V/70mA
Transmitter Size: 4.5 * 7 * 3.5cm/ 1.8 * 2.8 * 1.4in
Transmitter Weight: 47g/ 1.7oz(without battery
Receiver Weight: 12g/ 0.4oz