The main volume, the high tone adjustment and the bass adjustment are all adjusted by the analog components to upgrade the mini mixer, allowing you to play the music world and give you the real HIFI sound effect. This machine has a USB interface, and a built-in MP3 pointer is used to download the music you like to the disk and insert it into the machine, and instantly plug and play without waiting. Full function infrared control, convenient man-machine dialogue, make its function operation simple and easy to understand, let you do whatever you want. It can support many people to sing at the same time. Let you and your friends enjoy the fun of singing. Wireless Bluetooth, easy to connect for iPhone, for ipad, smart phones, tablet computers and other Bluetooth devices, USB interface, that is, broadcast and use, and enjoy high quality music. Rated Power: 80W + 80W Peak Power: 300W + 300W Standard Impedance: 4 - 16 ohms Frequency Response: 20KH - 20KHZ( +/- 3DB) Signal-to-noise Ratio: greater than equal 90DB (A power) Total Harmonic Distortion: less than equal 0.5% (normal working conditions) Signal Input Sensitivity: 200MV( +/- 30MV) MIC Input Sensitivity: 9MV( +/- 2MV) Use Of Voltage: 220V-240V 50/60HZ Colour: black Material: metal Size: 18x13.6x5.5CM Package Contents: 1 * Host 1 * Remote control Only the above package content, other products are not included. Note: Light shooting 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.