1. Cion Cells (button battery) or rechargeable battery 2. Output Voltage:3.6V;Out current:20MA; 3. LED intensity:100,000MCD, LED can service over 500,000 hours 4. Cranking (rotating the handle) generating electricity,cranking 1 minute 1 LED can light 1 hour 5. carry-home,subminiature and be easy to carry about 6. Waterproof and shatterproof 7. Environmental protection\energy-conserving 8. Safe design