Keep your attention on the road and your hands on the bars with the 4 button RC4 Remote from Sena Technologies. Ether clip it right to your handlebars and forget about searching for that decline call button. The buttons are spaced out nicely and perfect to use for the rider who wears gloves while they're on the road.; Works with Sena Technologies 30K, 20S, 20S Evo, 10U, 10C, 10R and 10S bluetooth communication systems Battery life: 5 months Water resistant