The NiteRider Nitelink Wireless Remote Switch allows you to maximize the full technology of Nitelink Wireless compatible lights. The Nitelink pairs with other Nitelink compatible lights making them more accessible, user friendly and safer. Now you can control your lights without removing your hands from the handlebars! Features: Connect and pair with other Nitelink compatible lights Power ON/OFF button, Light Mode Toggle Switch, and Turn Signal Indicator Buttons Fits up to 31.8mm handlebars Water and dust resistant IP64 Rated Specifications: Compatibility: NiteRider Nitelink Compatible Lights Battery: Replaceable CR2032 3V Color: Black Weight: 53g