Anodised 6063 alloy housing| is durable and allows heat to dissipate quickly. Acrylonitrile Styrene lens is the same material used in automotive headlights| is UV resistant, shatterproof, and offers high clarity USB Rechargeable Front Light Features a huge 400lumens of light powered by a Cree XPL LED. Function 100% (2hrs) - 50% (4 hrs) - Flashing (7hrs) - Breathe (5hrs) - Daylight (10hrs) IPX3 waterproof in a durable Anodised Alloy housing Includes USB recharge cable Low battery indicator when battery capacity is below 10% Charge indicator, blue whilst charging and off when finished. Stops overcharging Charging time 5 hours. 5-volt charging interface or USB outlet is suitable. Huge battery life of 3.7v/2400MaH