Features: -Powerful UHF frequency. The wireless headset/lap microphone system has powerful wireless signals,is not susceptible to electrical interference, and signal transmission is stable.  -Plug and play. The pairing is simple and easy to use. There is no need to install drivers. Plug the headset or lapel microphone into the microphone jack of the body transmitter, turn on the mini receiver and the bodypack transmitter and you're ready to go.  -Suitable for live performances such as churches, weddings, school dramas, training, public speaking, interviews or recordings.     Specifications: Type:UHF Wireless frquency adjusted;  Frequency range:UHF600MHz-699MHz;  Frequency response:Omnidirectional;  Power supply of receiver &body pack:AAA bateeries *2 pcs;  Frequency response:70Hz-10KHz;  Seneitivity:32±2dB;  Power supply:2*1.5V;  Channel:1*50 channel;  Working current:150Ma;  Working distance:30-100M ( at ideal working situation) Working time:4-8 hours;     Packing List: 1 * Receiver;  1 * Transmitter;  1 * Mic;  1 * Manual;  1 * 4-pin Cable;  1 * 3-pin Cable