All-Digital solution with "Mic-on-Chip" technology.
Four frequency groups to choose from. Each transmitter can switch frequency on-demand to all receivers instantly to avoid downtime caused by interference.
Operates in the 900 MHz band, far away from possible TV, radio, and Wi-Fi interference
Built-in rechargeable battery with 6 hours of run time on each charge. (3.7v Li-ion 650 mAh)