wireless system for micro U3 transmitter and rechargeable receiver operating on the frequency band of 2.4 GHz button Mic / Line transmitter on A / D converted 24-bit / 48 kHz uncompressed digital transmission channels 6 reach up to 20 m (no obstacles) frequency range: 20 Hz to 20 kHz latency less than 5 ms 110 dB dynamic range about 5 hours USB cable included robust housings autonomy ABS weight: 95g per unit.