Material: plastics+metalEffect: 12ms-200msOutput voltage: 4V MaxSignal to noise ratio: ＞85dBDistoration: 0.03% (1KHz Full Power)Frequency response: 20Hz-20KHz±3dBInput sensitivity:MIC: -36dBLine: -10dBEff Ret:-12dBTape In: -26dBsize: 173 * 130 * 40mm / 6.8 * 5.1 * 1.6inweight: 650g / 1.4lbWith stable quality, portable, artistic, small and exquisite.Suitable for company, stage, home, KTV rooms, etc.Connect the front of amplifier to input and power control the host.Dual Microphone inputs, video input and sound output for video signal, volume can be adjusted individually.Reverberation delay function and audio inputs/outputs for left/right channel volume frequency regulation.With anti-slip rubber pad for safe use.It can be powered by USB or battery (battery not included).Packing List:1 * Sound Mixer1 * USB Cable1 * User ManualPlease Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Please refer to the actual product received. Thank you!Due to the manual measurement and different measurement methods, Please allow slight dimension difference . pls make sure you do not mind before you bid.