SPECIFICATION: UHF 600-952MHz frequency range (region dependant) Digital wireless audio transmission 48KHz audio sampling mode. Pre-set 16 selectable frequencies Digital ID code, completely solves frequency interference IR sync downloading the frequency from receiver RECEIVER: Frequency range: 660-690MHz (region dependant) Frequency: Pre-set 16 selectable channels Modulation mode: pi/4 DQPSK Latency: Less than6ms Sampling: 48KHz Frequency response: 60Hz - 15KHz 2dB Total Harmonic Distortion: Less than0.8%(1KHz) Signal/noise ratio: Greater than92dB Receiving sensitivity: -92dBm Output: 6.35mm plug Power supply: 3.7V Lithium battery Power consumption: Greater than6 hours continuosly using TRANSMITTER: Frequency range: 660-690MHz (region dependant) Modulation mode: pi/4 DQPSK Transmitter power: 10mW Sensitivity: -47 db2dB Frequency change: IR synch Microphone type: Condenser Power supply: 3.7V lithium battery Power consumption: Greater than6 hours continuosly using size: Transmitter: 14.5 x 4 x 2.7cm Receiver: 18.5 x 2 x 1cm Material: Plastic colour: black Package Contents: 1 x Receiver 1 x Transmitter 1 x USB Charging Plug 1 x Charging Cable 1 x 6.35mm to 3.5mm Conversion plug 1 x Carry Bag 1 x Chinese and English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.