Cygolite Hotrod USB 50 Taillight Instead of being a clunky ornament hanging off you bike, the Cygolite Hotrod 50 features an insanely slim design while providing a wide, powerful output that'll keep you detected on traffic ridden roads. The Hotrod's svelte design tucks seamlessly behind seatposts including thin aerodynamic seatposts. The 50 lumens of powerful flashes alert motorists at night and in broad daylight, and then can be conveniently recharged via USB. Knowing that night riding often takes place in the midst of wet winter weather, the Hotrod 50 is water resistant and offers six lighting modes for varying conditions. Cygolite Hotrod USB 50 Taillight Features: 50 lumens of powerful flashes alert motorists at night and in broad daylight 30 lumens of steady output for both night and day use Run Time: 1:30 - 100 hours USB rechargeable internal Li-ion battery 24/7 Safety Technology features exclusive night and day modes that enhance visibility and safety Six lighting modes: High Flash, High Steady, Group, Zoom, Steady Pulse, Low Flash Cluster mounted array of LEDs work in unison for an extra wide and powerful tail light output, maximizing rider's visual presence anytime and anywhere Sleek design integrates well with the seat post or seat stay Built-in low battery indicator Water resistant Specifications: Battery: Rechargeable Lumens Rear: 50 Recharge Type: USB Weight: 29 g | Cygolite | Hotrod Usb 50 Tailight Tail Light