Professional 4 Channel Bluetooth Mixer o Mixing DJ Console with Reverb Effect for Home Karaoke USB Live Stage KTV 1.The mixer is equipped with, input gain and high and low bass adjustment,, high-definition headset output port, MP3 player, bluetooth receiver, and a connected PC sound card. 2.The mixer is small and light, and can be directly connected to the USB port of the PC for power supply. No additional power supply is required. It can be operated by connecting the computer to the power supply through the USB, eliminating the trouble of using an external adapter. Colour:black Material:plastic Package Contents: 1 x Audio Mixer 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.