1. Ensue long service life. 2. This item is muti-function, such as alarm, clock, mp3 player, FM radio. 3. bluetooth let your hands free. 4. Supportive of USB,SD,TF. Plug and Play. 5. Bulit-in Microphone, Incoming Display, Phone Ring Tip, ensue that you can catch every phone call. 6. Be suitable for any motorcycle and electric bike. 7. Solid case and waterproof. 8. Easily install and simply use. Specification: Product Name: MP3 Speaker. Material: Plastic. Voltage: DC 12V. Host Colour: Black with Blue Buttons. Speaker Color: Blue. Speaker Light Color: Purple. FM Frequency Range:87.5MHz-108MHz. Max Output Power:2x15W. The Frequency Response Range:20hz-20khz. Speaker impedance:4 - 8Ω. Operating Temperature Range: -30~ 60℃. bluetooth control distance: ≥ 6 meters. Mobile phone charging current: 800mA. Standby current: 15mA. Host Size:121mm x 61mm x 21.5mm. Speaker Size:105mm x 83.5mm. Function: 1. bluetooth playing function. 2. bluetooth phone call function. 3. Alarm Function. 4. Mobile phone charging function. 5. Power off memory function. 6. Waterproof function. 7. Radio function. 8. USB playing function. 9. TIF card playing function. 10. Pause and play function. 11. With display screen. Note: 1. We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. All dimensions are measured by hand, Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm). 3. Instruction is not included,professional installation is highly recommended. Package Included: 1 X Host Machine. 2 X Speakers. 1 X Power Line. 1 X Pair Speaker Brackets. 1 X Host Machine Brackets. 1 X User Manual. 1 X Mounting Hardware