SPECIFICATION: UHF 600-952MHz frequency range (region dependant), Digital wireless audio mission 48KHz audio sampling mode, Pre-set 16 selectable frequencies, Digital ID code, completely solves frequency interference IR sync downloading the frequency from receiver, Lithium battery power supply Portable plug-on receiver, plug in the mixer or active speaker directly Up to 60m line-of-sight operating range, Suitable for saxophone stage performances, street performances, etc. RECEIVER Frequency range: 660-690MHz (region dependant) Frequency: Pre-set 16 selectable channels Modulation mode: pi/4 DQPSK Latency: Less than 6ms Sampling: 48KHz Frequency response: 60Hz - 15KHz ± 2dB Total Harmonic Distortion: Less than 0.8%(1KHz) Signal/noise ratio: 92dB Receiving sensitivity: -92dBm Output: 6.35mm plug Power supply: 3.7V Lithium battery Power consumption: 6 hours continuosly using Dimensions: 185 x 20 x 10mm MITTER Frequency range:660-690MHz (region dependant) Modulation mode: pi/4 DQPSK mitter power: 10mW Sensitivity: -47 db±2dB Frequency change: IR synch Microphone type: Condenser Microphone dimension: Φ4.0 x 1.5mm Power supply: 3.7V lithium battery Power consumption: 6 hours continuosly using Dimension: 145 x 40 x 27mm Color: black Material: metal Package Contents: 1 x receiver 1 x mitter 1 x USB cable 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.