Features:1. Dual Waterproof Speaker with Aluminum Stereo Main Unit. High Performance Power Amplifier Built -in.2. Speaker Clamp Universal fit 78to114 handlebar. Support Bluetooth Wireless connection up to 15 meters.3. 3.5mm Audio Jack AUXIN Available . Support USB and micro SD Card MP3 files.4. Bluetooth Wireless: Stream your favorite music and radio channel from your smart phone. Compatible with iPhone45678X, iPod, Samsung Android Galaxy S Note Series and any smartphone devices .5. Superb Crystal Sound Quality . Advanced Waterproof Design. Digital Display. 6. Stereo Unit Built with High Quality Aluminum Material . Perfect for Motorcycle AT VU TV Electric Bike Marine Boat.Great for outdoor use.Specification:Cover: 87.5 - 108 MHzSensitivity: 37dBDistortion: 0.5Signal to noise ratio: 40dBRated voltage: 12V DCMaximum input power: 7W x 2Rated impedance: 4 - 8ohmBluetooth version: 2.1 EDRBluetooth protocol: AVRVP1.0, GAVDP1.0, ADVTP1.0, A2DP1.0Wireless transmission range 15 metersFrequency range: 20Hz - 20KHz3.5mm audio jack: yesSD slot size: microSDUSB: USB drive with mp3 formatUSB charging: NoNotice:1.Due to the different monitor and light effect, the actual color may be a slightly different from the picture color.2.Please allow 1-3cm differs due to manual measurement.Package List:1x Speaker1x Hex key1x Manual