Minimal and mighty! The USB rechargeable Asteroid headlight from Portland Design Works mounts in seconds and shines super brightly with high-quality optics so you can be seen. Ride for up to 24 hours before needing a new charge. - 3 Modes (burn time): Flash (24 hrs), Pulse (5 hrs), Steady (4 hrs) - UV Proof rubber mount - Double-click lens to turn on/off - Micro USB charge cord included - Weatherproof exterior for all season riding - Weight: 73 g (2.6 oz)