Motorcycle audio system with Bluetooth, USB, AUX, and SD card support1、Dual waterproof speakers with aluminum stereo body. Built in high performance power amplifier. The speaker clip is universally installed with 7/8" to 1 1/4" handles. Supports Bluetooth wireless connection up to 15 meters. 2、 3.5mm audio jack AUX IN is available. Supports MP3 files of USB and storage card. (USB charging is not supported). FM radio, clock display. 3、 Bluetooth wireless: Play your favorite music and radio channels through your smartphone. Compatible for iPhone 4/5/6/7/8/X, for iPod, for Samsung Android Galaxy S Note series and any smartphone device. 4、 First class crystal sound quality. Advanced waterproof design. Digital display. The stereo unit is made of aluminum material. It is very suitable for motorcycle ATV UTV electric bicycle marine boat. Very suitable for outdoor use. 5、 Easy to install: Comes with all necessary hardware and wiring. Plug and play. Standard 12V power connection.