Ravemen TR150 Tail Light Watch Your Back The TR150 packs four red LEDs into a compact housing and flashes at up to 150 lumens, so it's visible in daylight and up to 1. 5 kilometers away at night. A 280-degree field of view shows you off from the side too. When it senses you braking, the light brightens for 3 seconds. It turns itself off after two minutes of stopping and on again when you move. Features Four red LEDs, up to 150 lumens, visible from up to 1. 5km away280-degree field of view, internal reflecting stripes add side visibility Brake detection, brightens the light for 3 seconds when you slow down Auto on/off, shuts off after 2 minutes idle and turns on with motion Six lighting modes, 800m Ah battery with up to 18. 5 hours on low Multiple mounts included, round and aero seatpost, saddle, and backpack mounts IPX6 and USB-C, reversible charging connector, usable in the rain SPECIFICATIONSIntended Use Road, Commuting, City Riding Max Output150 lumens Light Source4 x red LEDs Modes High 20 lm (6h) | Mid 10 lm (12. 5h) | Low 5 lm (18. 5h) | Warning Flash 150 lm (6. 5h) | Rapid Flash 50 lm (11. 5h) | Slow Flash 50 lm (11h)Battery800m Ah / 3. 7VCharging USB-CWater Resistance IPX6Dimensions38 x 25 x 57mm Weight50g | Ravemen | Tr150 Tail Light 150 Lumens