Boya BY-WM4 Pro Wireless

Compatible with smartphone, DSLR,
consumer camcorders and PCs etc.
• Ideal for video, podcast, and mobile journalism
applications etc.
• 2.4GHz digital transmission technology.
• Two Transmitter and one dual-channel Receiver.
• Line input jack on transmitter for digital audio input.
• Headphone jack on receiver for real-time monitoring.
• Up to 60m (197ft) operation range without obstacle.
• Powered by two AAA batteries.
• Omnidirectional lavalier microphones, zipper bag,
standard camera shoe mount and clips included. 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: 3V DC (Two AAA size batteries)
Consumption power: Transmitter: 3V/70mA
Receiver：3V/70mA

Dimensions:

Receiver: 45x70x35mm (1.8*2.8*1.4 inches)
Transmitter: 45x70x35mm (1.8*2.8*1.4 inches)
Weight: Receiver: 47g (1.7 oz)
Transmitter: 47g (1.7 oz)