Xvive Audio U3 2.4 GHz Digital Wireless Microphone System

2.4 GHz ISM worldwide open band 6 switchable channels 20 Hz-20 kHz (-3dB) frequency response Works with dynamic and battery-powered condenser microphone 110 dB (-3 dB) dynamic range 5 hours battery life 5V (USB) charging voltage Wireless audio system for active loudspeakers