The RC4 gives you full control of your Sena Bluetooth headset at the push of a button, without having to take your hands off the handlebars. The glove-friendly 4-button design is effortless to use, allowing you to focus on the ride. The device sits directly on the handlebars, so they can drive you immediately. The RC4 is much more compact than its predecessor and fits perfectly on even more handlebar types and sizes. You will never have to put your helmet back in to use the intercom, answer calls or pick another song. The RC4 has a battery life of about 5 months.