1. Wireless bluetooth hands-free motorcycle audio kit(Main unit+4 x Speaker) 2. High fidelity stereo design, Large LCD display with function clock 3. Allow you to listen MP3 music from bluetooth device or FM radio without cable connection 4. bluetooth synchronous broadcasting,you not miss the retransmission sport event,a special flash information of when your are on the road 5. Support MP3 music from USB or SD/TF card(not Support 3.5mm external connection of MP3 players or tablet etc, not being a sound box) Support full-band FM channel(AM band is ) Built-in high-sensitive MIC to support hand-free call Has warning bell when the phone rings,voice prompt when change modes Remote control has a built in AUX input and background light for dark conditions Specification: Voltage: DC 12V Speaker color: Black housing, Silver front cover Host Color: black with blue / red buttons Speaker Material: plastic Function: MP3, alarm, clock, FM Radio General radio specifications: Output: 2x15 W Speaker Specifications: Impedance: 4-8 Ω Frequency: 165Hz Effective frequency range: Fo-12Khz Distortion: less than equal 5% In: 15 W Maximum output: 30 W Connection: 2 cables (approximately 100 cm each) Dimensions: standard 3 inch, size 8x8x10.5 cm Cable Length: .85cm Fitment: Fit For Most Motorcycle Type: Bluetooth Connection colour: Black+silver Material: plastic Package Contents: 4 x Speaker 2 x Main Control Unit 4 x Holder 2 x Remote Control 2 x Screw Kit 2 x Mounting Clamp 2 x Connecting Line 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.