Power supply voltage: 12V DC; Audio input and output: 3.5mm stereo, coaxial input: jack; Supports line-in, coaxial input, and 5.0 Bluetooth audio (Bluetooth name: MK88); Digital reverb, two effect modes, dual microphone input, and and treble adjustment; Paired with a wired or wireless microphone, connect a phone or TV, open a singing app, and connect to a computer's powered speakers or an amplifier for a powerful home karaoke system. Voltage: AC100-240V Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Color: Black Material: Metal Package Contents: 1 x Audio Amplifier Mixing Board 1 adapter 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.