Cocoweb Sports Bike Rear Safety Tail Light - 8 LED lighting modes - Black / Red Automatic Operation - Powers on automatically at night and when braking, keeping you safe automatically 8 Light Modes - Lights up the road with everything from a steady beam to an emergency strobe, visible from over 200 yards away! Energy Efficiency - uses 2 AAA batteries (included) and shines for up to 60 hours. Simple Installation - Clips right onto its mounting bracket (included), letting you take it with you wherever you go LED Reliability - Lasts for up to 50,000 hours with its LED systems; you will never need to buy another tail light again!