.Crank to generate power

.No need to replace batteries

.With 3pcs super bright white LED

.LED life: over 100,000 hours

.LED luminance: 15000MCD

.Winding 1 minute supports 30 minutes continuous lighting

.Two brightness: 1 LED and 3 LED

.Rechargeable: 120mA Lithium/3.6V/LIR 2450

.With bicycle bracket for easy installation and un-installation without fools