Working Voltage DC 12VAudio Input /Output 3.5mm Stereo With Coaxial inputBluetooth 5.0 Input (Bluetooth Name :MK88)Digital Reverb: two effect modes, support dual microphone input, high and low bass adjustment.Audio Output need Connect to Active speakers or amplifiersChannels:2 (2.0)Model Number:MK-88color:BlackMaterial:plasticPackage Contents:1 x Audio Amplifier Mixing BoardOnly 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.