The Topeak TailLux 100 USB Rear Bike Light delivers outstanding rear visibility for safety in all riding conditions. Powered by nine ultra-bright LEDs producing up to 100 lumens, it offers four versatile lighting modes-constant, blinking, and mixed sequences-to adapt to traffic and trail environments. A built-in 700 mAh lithium-ion battery recharges quickly via USB-C, while the tool-free silicone strap allows bi-directional mounting on aero or round seatposts, seatstays, Topeak bags, or helmets. Compact, waterproof, and durable, the TailLux 100 is engineered for reliable performance on every ride.Extreme Rear Visibility: Emits up to 100 lumens from nine ultra-bright LEDs, combining flood and spot beams to maximize visibility in urban traffic or dark country roads.Multiple Lighting Modes: Four light patterns (Constant 3 h / Blinking 30 h / Blinking + Constant 5 h / Constant + Blink 10 h) adapt easily to changing light conditions.USB-C Rechargeable Power: Built-in 3.7 V 700 mAh lithium-ion battery recharges in about 3-4 hours for long runtimes without disposable batteries.Flexible Universal Mount: Bi-directional silicone strap fits aero or round seatposts (25.4-34.9 mm), seatstays, Topeak bags, or helmets for quick, secure attachment.Weatherproof Durability: Constructed from engineering-grade polymer with an IPX 6 waterproof rating, ensuring consistent performance in rain or wet riding conditions.Manufacturer Sku: TMS093RRTodson Sku: 65002093RR