The sound card has , interesting modes and adjustment knobs. One key to eliminate the sound, smart/. DSP intelligent noise reduction chip, low power consumption, stereo. Built-in rechargeable polymer lithium battery with long battery life. Universal functions, support for singing, live broadcast, recording, music and other functions, and support mainstream live broadcast software. Product name: K song live sound card Power consumption: 5W Rated input voltage: 5V/1A Frequency range: 20h-20khz Colour:black :Metal Size:130 x 105 x 25mm Package Contents: 1 x Sound card 2 x Live line 1 x USB data cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.