Magicshine Seemee 300 Smart Taillight Safety Dance The Seemee 300 is a 300-lumen taillight that lights you up from behind and from the sides. A downward-facing Opti Tracing LED projects a red warning light around you, so drivers see your outline, not just a dot. A motion sensor makes it brighter when you brake, and the battery runs for up to 200 hours. Features300 lumens from two LEDs, a main light plus an Opti Tracing light Opti Tracing light, projects a red warning halo around the rider for all-around visibility Smart motion sensor, automatically gets brighter when you brake or slow down1600m Ah battery, up to 200 hours of runtime on a single charge IPX6 aluminum housing, handles heavy rain and road spray Seatpost, aero seatpost, and saddle mounting, tool-free installation with included brackets USB-C rechargeable, quick, convenient charging SPECIFICATIONSIntended Use Road, Commuting, City Riding Max Output300 lumens Sensors Brake/motion sensor, ambient light sensor Battery3. 7V 1600m Ah Max Runtime200 hours Charging USB-CWaterproof Rating IPX6Material Aluminum Mount Seatpost (round and aero) and saddle mount Weight80g | Magicshine | Seemee 300 Smart Taillight 300 Lumens