Function: 1. Using Bluetooth technology, support music playback from Bluetooth connection, easy installation and configuration. 2. Support U disk playback, support lossless MP3/WMA/WAV format. Support FM radio, automatic station search and save. 3. Made of high quality aluminum alloy, good oil resistance and water resistance, matte silver appearance, stylish and beautiful. 4. It features a four-level waterproof function, power overvoltage protection, and reverse connection protection. 5. Suitable for motorcycles and electric bikes with a handlebar diameter of 22-30mm/0.9-1,2 inches. Specification: Item Type: Motorcycle Speaker Material: Aluminum Alloy Characteristics: 1. Motorcycle handlebar sound with all-metal construction 2. Suitable for men's motorcycles 3. Support music playback from Bluetooth connection 4. Support mobile phone charging; 5. Support FM radio function; automatic station search and storage 6. Support U disk playback, support lossless MP3/WMA/WAV format, 7. Four-level waterproof function, power overvoltage protection, reverse connection protection; 8. With two 3-inch waterproof full-range speakers 9. Built-in flashing horn light 10. Output Power: 20 W x 2 Suitable for motorcycles and electric vehicles with a handlebar diameter of 22-30mm/0.9-1,2in Wiring Instructions: Red: Positive Black: Negative electrode Blue: radio antenna, no need to connect List of packages: 1 x Motorcycle Sound 1 x Manual