. The Volt 400 Duplex Helmet Light puts out a powerful 400 lumens up front to illuminate the road/trail ahead. Also, as it’s attached to your helmet, you can point the beam exactly where you want it, rather than it being limited to how much you can turn your bars! Front and Rear Visibility. It also features a bright 50 lumens rear light at the back of the unit, to make you more visible to upcoming traffic. USB rechargeable, and packed with a range of settings, the Duplex light will help you to keep up that commute to work through the darker months!Features: USB Li-ion cartridge rechargeable battery Lightweight Wide mounting strap with angle adjustment Recharging Time: 6 hours Front Output: 50-400 lumens Modes/Outputs/Runtimes: High: 400 lumens, 3 hours Mid: 100 lumens, 10 hours Low: 50 lumens, 18 hours Hyper Constant: 400 lumens, 9 hours Flashing: 50 lumens, 150 hours Rear Output: 10 lumens Runtime/Modes: Constant: 25 hours Flashing: 250 hours Weight: 110gBuy Cateye Accessories from Chain Reaction Cycles, the World’s Largest Online Bike Store.