Familyus New Style Waterproof Bluetooth Motorcycle Scooter Bike ATV Jet Ski Stereo Sound System Radio Remote Alarm Speaker FM Radio MP3 Player The size of the speaker:10.3x3.1x3.1 inches. A new Water Resistant speakers specially designed for motorcycle. Use metal aluminium,whole machine striple design and double horn hollow out design. Bluetooth connection to play music,enjoy your music on the road and relax,more destails please look at the pictures. Before use,please have a read of the user's manual which will be sent with the original package.