brand new and high quality Features: Mono, can be connected with tweeter. Internal high-quality Bluetooth-compatible module Support microphone interface output. Adjustable high and low audio,select different sound effects. The phone is connected to Bluetooth-compatible and the phone controls the playing of music. Stable,low energy consumption, power saving, low heat generation, long service life. Can for play U disk TF card for music and FM stereo radio. Charge your devices while on the go with dual USB ports. Power Amplifier Board Set only,other accessories demo in the picture is not included Specification: Support Voltage: 220V12V/24V Bluetooth-compatible Call: not supported FM Radio: support Channel: Mono stereo USB: Support Remote Control: support Bluetooth-compatible Version: 4.2 Bluetooth-compatible Music: support Microphone: support TF/SD: Support Bass Adjustment: support Material: Plastic Size: app.14x8.5x7.8cm/5.51x3.35x3.07in Color: Black Quantity: 1 Set Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x Power Amplifier Board 1 x Remote Control 1 x Speaker Cable 1 x Computer for VF Cable 1 x 220V Power Cable 1 x 12V/24V for DC Cable