The Astro 40SL 410 Lumen Rechargeable COB LED Slim Light is built with a unique dial power switch which has variable fluid adjustment from 0-410 lumens of light output. It is rated for 10 hours of work time at 50% power, and 2.5hrs at full power. The swivel and stay base features a 20lb magnet that can be removed to shorten its profile, and the 40 chip COB LED array allows for light density up to 850% more than SMD LED's while consuming less power. This light is externally and internally designed for harsh conditions and dirty environments and includes a steel collapsible hanger. It is USB rechargeable (includes wall adapter and Micro USB cable) and is built with a Samsung Lithium Ion 2200mAh battery that has a charge time of 4hrs. Includes overcharge protection and auto idle mode.