Description The LT350 is our first light to offer the convenience of micro USB recharging. Now you have the added ability of charging your light from a laptop, tablet or a portable power pack. The exceptionally powerful beam is unleashed by a variable control magnetic switch. You control the intensity and the battery duration. Slide it forward to get 380 lumens for a 4 hour duration or pull it back to get 10 lumens for 20 hour duration. Features: Magnetic switch offers variable light output Brightness – 10 lumens to 380 lumens Battery duration – 20 hours to 4 hours Fully charged in 3 hours (DC 1A/5.0V) Depth rated to 330′ (100 m) Beam distance – 1020′ (310 m) Battery – Rechargeable 18650 Lithium Ion