Motorcycle Aluminium Bullet Shape Waterproof Heavy Duty Wireless Bluetooth Stereo System with USB Charging Port & Aux Bluetooth A2DP Wireless Stereo System For Biking, Cycling And Racing - Max Speed: 100 Mph Wireless Remote Control The Speaker From Your Mobile Phone In A Range Of 10 meter (30 feet) Jog Dial On Speaker For Power On/Off, Bluetooth Pairing, Volume Control, Play & Pause Waterproof Design, Handles All Weather Conditions Built-in Coaxial Hi-Fi Powerful Mid-range 3" Loud Speakers 360 Degree All Direction Swivel Built-in 2 Channel Amplify, max 800W Watts Power Output AUX-In 3.5mm Plug Port For Use with iPods, MP3 Players & Portable CD Players. USB Charging Port For Mobile Phone, GPS, Bluetooth Intercom Headsets or Any Other DC 5V Device. Easy Installation, Just Pair or Plug To Play 12V DC Power Supply VoiceCoil Impedance: 4 ohm Frequency response: 150Hz-20kHz S/N: 88dB Rated Input Power: 50W Max Input Power: 400W watts ea Distortion: &lt;= 5%