| Specification | Details |
|---|---|
| RF Modulation | GFSK (Gauss frequency Shift Keying) |
| Frequency band | 2.4 GHz (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 |
| RF Output Power | <10mw |
| 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 | TX4 PRO: 3V DC (Two AAA size batteries) / BY-WM4 PRO RXU: Supplied by USB Type-C device |
| Plug | BY-WM4 PRO RXU: USB Type-C Connector |
| Consumption power | Receiver: 3V/70mA Transmitter: 3V/70mA |
| Dimensions | TX4 PRO: 45x70x35mm (1.8×2.8×1.4″) / BY-WM4 PRO RXU: 82×30.7×12mm (3.2×1.2×0.5″) |
| Weight | TX4 PRO: 47g (1.7 oz) / BY-WM4 PRO RXU: 9.5g (0.3oz) |
| Packing List | Receiver (BY-WM4 PRO RXU) x1, Transmitter (TX4 PRO) x2, Lavalier/lapel microphone x2, Wind screen x2, Microphone Holder clip x2, Pairing Pin x1 |









