The Topeak Whitelite DX USB Front Light is ideal for commuting riders. No more batteries, this tiny rear light easily plugs into a computer’s mini USB port to recharge, charging with in 5-6 hours for up to 11-30 hours burn time. The Topeak front light features 4 super bright white LED's that give you a brilliantly strong light ensuring your seen in low light conditions. Perfect for when your out and about on roads with increasing your visibility to approaching motorists. The flexible silicon loop hook easily mounts without tools to your handlebar. The Topeak Whitelite DX USB Front Light is great for any day riding, with constant and blinking modes, make sure you'll always be seen. Topeak Whitelite DX USB Front Light Features 4 super bright white LEDs illuminate the way USB port allows recharging of lights from your computer USB light attaches to most handlebars with its flexible loop hook- tool free Water Resistant 2 Modes, constant/ blinking 11hrs/ 30hrs burn time 1 hour reserve time 4.5 x 4.2 x 2.8 cm 1.8” x 1.7” x 1.1” 40 g / 1.41 oz (light only) "