Streamlight twin-task USB Headlamp with USB cord and elastic head strap, black/Red features:- IPX4 water resistant-2 impact resistance tested- 120 tilting head- low profile, ergonomically balanced design- adjustable elastic head strap specifications:- case material/lens: high impact, super tough nylon construction, and polycarbonate lens- light source: C4 LED and Cob LED technology, impervious to shock with a 50, 000 hours lifetime- on/off: multi-function push button switch- battery: rechargeable 2200 mAh lithium Ion, charges in 4 1/2 hours and rechargeable up to 300 times- dimensions: head light: 1.35" height x 2.125" width and head bracket: 2.67" length: 2.67" - weight: 6.10 oz (with li Ion battery)- color: black/Red out put/runtime: spot:- high: 375 lumens, 3, 650 candela.121 beam, and runs 4 3/4 hours- medium: 175 lumens, 1, 850 candela, 86 beam, and runs 8 1/2 hours- low: 50 lumens, 440 candela, 42 beam, and runs 20 hours""