The Revolabs 02-HDDUAL-NM HD Dual-Channel Wireless Microphone System uses MC/TDMA/TDD radio transmissions both to and from your microphone, allowing the system to co-exist with wireless 802.11 networks and GSM cell phones without interference. It also includes digital encryption technology for secure communications. The system has analog 3.5 mm input and output connectors, which can be switched between mic and line level operation and also have the ability for both inputs and outputs to be mixed to a single channel. Includes Dual-Channel Base Station, Dual Channel Charging Base, and power Adapter