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