* Two Pairs Black 3" Full Range Speakers Feature a Built-in Bluetooth Wireless Streaming Receiver – No Headunit Needed * 1000 Watt Max Amplifier (Dimensions 3.9" x 3.1" x 1.5") with Wired Remote Volume Control * Bluetooth Audio Streaming - Stream your Favorite Music or Music Service like Spotify or Pandora Wirelessly * 3.5 mm Aux Input Compatible with Audio Output of Smartphones and MP3 Players * Frequency Response 80Hz to 15KHz, SN >85dB, THD: < 0.01% * Includes Mounting Brackets Adjustable to fit 0.75" to 1.25" Handle Bars * Great for 12V Motorcycles, Scooters and ATV's! * Weatherproof