915R works as radio receiver.
Paired with 813TM (transmmitter).
Carrier Frequency: 2.4 GHz; channel numbers: 199;
Working time: 50 hours; battery: lithium polymer battery, 1000mAh;
Charging method: charging base and USB cable.
Working distance: 150 - 200 meters; machine size: 50*26*14mm; weight: 47g;
Accessories: earphone and lanyard.