High fidelity smooth stereo design,support MP3/WMA music from Bluetooth device,also support AUX cable/TF card/USB to play. Personalized design, built-in radio, it's very easy to carry for thoes like to listen to the radio rider. Electronic tuning radio, triple-band 18 storage stations. MT493 in strict accordance the requirements of outdoor design, anti-rain, easy to face a variety of weather, the real waterproof riding speaker. Wireless Bluetooth motorcycle audio system,With over voltage protection, reverse connect protection and short circuit protection. Efficient class D amp built in with digital power supply. Aluminum-alloy metal housing and metal handlebar mount brackets built in. Anti-theft bolt-down mechanism.