Sena RC4 4-Button Handlebar RemoteThe RC4 clips onto your bars so you can have immediate access to Sena menu functions without needing to reach up to your helmet. The four button array can easily handle tasks like engaging intercom, answering calls or changing a song. The RC4 strikes a balance between ease of use with a gloved hand while being unobtrusive enough not to interfere with the other controls on your bike.Features: Simple spring-loaded clamp-on installation Glove-friendlybuttons Up to 5 month battery life Status LED Compatibility: Momentum Lite Momentum Momentum Pro Momentum INC Momentum INC Pro Cavalry Savage X1 X1 Pro R1 R1 Pro 50S 50R 30K 20S EVO 20S 10U 10Upad for HJC IS-17 10Upad for HJC IS-MAX2 10C 10C Pro 10C EVO 10R 10S SRL SF1 SF2 SF4 Schuberth SC1 Specifications: Operating time: 5months Operating temperature: -10C ~ 55C (14°F ~ 131°F) Water resistant Dimensions: 76.5mm x 39mm x 15.5mm (3"x 1.54" x 0.61") Weight: 28g (0.9 oz) Bluetooth 4.1 Generic Access Profile (GAP) Generic Attribute Profile (GATT) Working distance: up to 10 meters Battery Type: CR2016 Lithium coin battery Certificates: CE, FCC, IC Note:The LED indicator light is only visible when lit.SC-4B-01