Ravemen TR250 Tail Light Watch Your Back The TR250 is the brighter sibling of the TR150, with five red LEDs and a warning flash of up to 250 lumens. It's visible up to 1. 8 kilometers away and has a 280-degree view from the sides. A brake sensor makes the light brighter for 3 seconds when you slow down, and it turns itself on and off as you ride. Features Five red LEDs, up to 250 lumens, visible from up to 1. 8km away280-degree field of view, wide visibility from the back and sides Brake detection, brightens the light for 3 seconds when you slow down Auto on/off, turns off after 2 minutes stationary and on when it detects movement Six lighting modes, 800m Ah battery with USB-C charging IPX6 water resistance, handles rain, with a quarter-turn mount for seatposts and saddle rails SPECIFICATIONSIntended Use Road, Commuting, City Riding Max Output250 lumens Light Source5 x red LEDs Modes High 40 lm | Mid 20 lm | Low 5 lm | Warning Flash 250 lm | Rapid Flash 100 lm | Slow Flash 100 lm Battery800m Ah / 3. 7VCharging USB-CWater Resistance IPX6Dimensions38 x 25 x 57mm Weight51g | Ravemen | Tr250 Tail Light 250 Lumens