Sigma's newest rear safety light brings more modes. more mountingoptions and more safety. The Tailguard has five LEDs and can be mounted to your sest past, rack, belt or bag. Powered by 2 x AAA batteries the Tailguard provides up to 150 hours of burn time. Rear 5 LED safety-light. 4 modes constant an 3 flashing. 2 x AAA batteries included. Burn time up to 150 h. Watertight. Rack mount. Details Click switchEasy to switch on and off, even when wearing gloves. 220 Visibility angle beam. Always visible. Fast tool-free mounting. Adjustable rubber clamp mounting; just right for fastening to all seat posts and rear wheel stays. Housing: Impact resistant and waterproof for all uses.