High Lumens Flashlight & 4 modes: flashlight uses high efficiency, high output, high power LED chip, High lumens can provide up to 600 feet of strong light. 4 modes: high / medium / low / strobe. Long-lasting, Rechargeable &Rechargeable battery: LED flashlight has a service life of more than 100,000 hours. Rechargeable lithium ion b ttery (supplied) with internal digital control circuit to prevent overcharging to ensure safety. It is fully charged in only 3 hours and can be charged from any USB port.