Interview, recording microphone series

Wireless frequency range: 470-960 MHz
Operating voltage: DC3.7V (built-in polymer lithium battery)
Modulation: DQPSK
Battery charging time: 3-4 hours
Audio frequency response: 30Hz-18kHz
Battery life: 8-10 hours
Microphone Specifications: Condenser Omnidirectional
Reference distance: 80 meters (outdoor open space)
Number of channels: 20 channels (10 channels for A and B)
Operating temperature: 0°C to 50°C
Wireless transmit power: ≤10mw
Storage temperature: -20°C to +55°C
Signal-to-noise ratio: ≥90
Monomer weight: RX 95g TX 105g
Product Specifications (LxWxH): RX 95x73.5x29.5MM; TX 88x57×14MM