1. Flashlight uses high efficiency, high output, high power , 1200 lumens can provide up to 600 feet of strong light. 2.Long-lasting, Rechargeable &18650 battery : LED flashlight has a service life of more than 100,000 hours. 18650 lithium ion battery (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. 3.Adjustable Zoom, Waterproof Flashlight : It can be adapted to different situations by stretching the body, zooming out and zooming in, and lighting at a long distance or a large area. IPX5 waterproof design, suitable for rain, snow or emergency situations. 4.Durable Pocket Flashlight : made of high-quality aluminum alloy. Rugged aluminum body and high impact resistance. It is compact enough to fit in a pocket, backpack or wallet for easy storage and quick use. 5.Applicable Places : suitable for daily use, walking dogs, walking, hiking, camping, fishing, night maintenance, emergency, etc. Note: Before the first use, please remove the insulation sheet of the battery.