Features: sound mixer can be controlled by linear audio input and can be connected to 2 sets of microphones. Dual Supply Modes -- powered by 5V bank(not included) or adapter (universal voltage 110-220V). Features separate reverberation effect and high/bass adjustment. Support functions of U-disk playing MP3 and recording audio broadcasting BT playing. With control panel including knobs of previous pause function switch . Stable lightweight small and elegant suitable for company stage families and KTV rooms enjoy singing and have fun with it. Specifications: Color: Black/White (optional) Input Voltage: 5V Item Size: 14 * 14.6 * 4.5cm / 5.51 * 5.75 * 1.77in Item Weight: 298g / 10.51oz Package Size: 19 * 19 * 8.5cm / 7.48 * 7.48 * 3.35in Package Weight: 580g / 20.45oz Package List: 1 * Sound Mixer 1 * USB Cable 1 * Cable 1 * Adapter 1 set of audio cable 1 set of video cable