813MT works as radio transmitter / tour guide microphone.
Paired with 915R receiver.
813MT has built-in microphone. Speaker can talk to the 813TM directly without pluging in a microphone first.
Waveband: 2.4GHz; size: 86.5*48*18mm
Weight: 100g; channel numbers: 199;
Working distance: 150 - 200 meters; working time: 8 hours;
Battery: lithium polymer battery, 1000mAh;
Accessories: microphone and lanyard.