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 Li-ion rechargeable battery this headlamp has a 4 hour run time and 130 meter 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 bes a necessity when working with gloves on.