Shark Shkrhm670 1800 Watt 4 Ch Motorcycle Marine Boat Audio System Bluetooth (Black) 4 ch 1800 watt marine stereo motorcycle audio system with wired volume control remote Install to motorcycle in 20 minutes. Great sound, connects to any Device via bluetooth, aux. Handle bar clamps included on this system. Stunning high quality chrome speakers Everything is waterproof but the amplifier. Mirror & handle bar Brackets included fits all handlebars 7/8" 2 1/2 inches