The Dorcy Ultra HD rechargeable headlamp has motion sensor built in for easy hands-free use. The headlamp is loaded with features including instant spot to flood, spot mode, red night vision mode making this the prefect headlamp. Powered by a 1200 mAh lithium-ion rechargeable battery this headlamp has a 4 hr run time and 130 m beam distance. The motion sensor hands free mode allows you to wave you hand in front of the light to turn it off and on. This becomes a necessity when working with gloves on (41-4337).