This PDW light set consists of the Pathfinder 200 lumen USB rechargeable headlight and the Io USB rechargeable taillight. The Pathfinder 200 has a powerful lithium-ion battery and a darkness destroying CREE LED bulb. The Io has 3 different modes, steady, flash, and pulse, and is perfect for urban riding. Features: Headlight: 4 Modes: Steady low (4 hours), Steady high (2 hours), Pulse (8 hours), Daytime Flash (25 hours) Headlight: Vertical Cutoff Beam focuses beam into perfect bike path pattern while shielding the LED to prevent blinding oncoming traffic Taillight: Mounts vertically or horizontally Taillight: 3 modes (runtime) Steady (10h) Flash (20h) Pulse (20h) Specifications: Brightness: 200 Lumens (Front) Battery Type: Rechargeable (Micro USB) Run Time: 2 - 25 Hours (Front), 10 - 20 Hours (Rear) Beam Color: White, Red Color: Black Weight: 52g (Front), 54g (Rear