Splashproof aluminum case, cree high power LED, easy strap fitting (20-40 mm), five light functions (luminous time: permanent high (1h), medium (3h), low (6h), flashing (12h), fast flashing (60h)), rechargeable via USB, 580 mAh li-polymer battery, Lights listed under "Outdoor" may not be affixed to bikes/vehicles or used on public roads in Germany.