About product: 1.This auto volume control device is used to balance the volume output of karaoke player,PA System, broadcast TV System, TV STB, Satellite TV and DVD Player. 2. When you listen to karaoke songs, sound volume level often sounds fluctuating, so we need this automatic volume control device to adjust the sound, make the karaoke songs audio volume output in the same level.
Easy to Use: Simple in and out connections, no additional wiring needed, handy to install when you want a quick way to adjust your volume on your player.
Note: Audio input and output only from RCA output of this device.
Package include: 1 X Auto Volume Control 1x power adapter 1x Audio cable