●Portability: Just a head lamp , Small in size , light in weight (only 210g for whole product), wireless magnetic inductive charging, easy usage ●Safety: High IP grade with All-in-one intrinsic safety design and compact structure; With over-charge & over-discharge protection for battery. protection in electrical short-circuit, automatic power-off on the socket , 50,000 hours LED's Lifetime ●Energy saving: In same brightness, the LED can save 70% energy compared with traditional light source. ●Economy:Long lifespan LED; maintenance free. Battery can be used for 1000 circles. ●Environmental: Li-ion battery is free for maintenance, and the material of li-ion is environmental, use 3Watt high power LED as the main light, and 2pcs backup LED's to save power ●Efficiency: more than 13hours at full brightness.more than 26hours at half brightness, over 100hours at back up led brightness.Over 15000lux at starting time, and more than 10000lux after 11 hours continuous lighting.Battery usage lifetime about 1000 cycles. ●Uniqueness:Wireless charging technology avoids poor contact of charging which caused by the oxidation of charging port ● Protection category: IP68 ● Ex mark : I M1 Ex ia op is I Ma EN 60079-35-1