Features 1.INPUTS AND CONNECTIONS: The mini sound mixer can be controlled via the linear sound input and can be connected to 2 sets of microphones. 2.DUAL POWER MODE: This small sound mixer is powered by a 5V mobile power supply (not included) or a power adapter (universal voltage 110?220V). 3.MULTI FUNCTIONAL: With independent reverb effect and treble, bass adjustment. Supports USB flash disk playback, MP3 and recording, sound broadcasting, BT playback function. 4.EASY TO USE: With control panel, including knob for previous music, pause, function switch, another music. With function display, the operation is clear at a glance. 5.MULTI APPLICATION: Mini karaoke mixer, stable, lightweight, compact and elegant, suitable for stage, home and KTV rooms, let you enjoy singing and have fun. specificationItem Type: Mini Sound Mixer Material: ABS Product Size: Approx. 14 x 14.6 x 4.5cm / 5.5 x 5.7 x 1.8in BT: BT 4.0 Input Voltage: DC 5V Voltage: 100-240V PackageList1 x MiniSoundMixer 1 x RCASoundCable 1 x 3.5mm Splitter Sound Cable 1 x Plug 1 x Adaptor 1 x Data Cable 1 x Instruction Manual NoteManual measurement, please allow some errors.