The Knog Bilby RUN with 400 lumens is a high-performance, lightweight, intuitively designed headlamp. Compared to the original Knog Bilby, the RUN model has a red side light shining through the translucent one-piece silicone strap to the sides. The headlamp can be controlled by the ModeMaker app and has 7 pre-programmed modes in the base with a battery life in excess of 100 hours. A fully discharged device can be fully charged in just 4 hours using the USB port. Weight: 90 grams Charge Time: 4 hours MODS / MAX. LUMENS / BATTERY LIFEBoost Right 400 5-60 hrs Boost Left 240 9-80 hrs Ambient R 200 14-105 hrs Ambient L 482 2-98 hrs Spot 200 14-105 hrs