Perfect for the urban environment, the Cube R50 stands out in the crowd and the compact COB (chip-on-board) arrangement takes up the smallest space on the handlebar. Key Features • Max Output 50Lm • Runtime 3.5-8hrs • 36 diode COB LED • Low battery indicator • USB rechargeable 3.7v 300mAh Li-Pol battery • Waterproof IPX4 • Tool-free seat-post strap and micro-USB cable included Modes & Runtime 100% Constant: 3.5hrs 50% Constant: 4.5hrs Flash: 4.5hrs Pulse: 4hrs Day Flash: 8hrs