LED : 7 Watt Luxeon K2

Output :125 Lumens

Run time :60 Minutes

Battery :2 x CR 123 (Not Included)

Switch :Tail cap switch

O-ring :Yes

Roll Resist :Notched Bezel

Size :5.5 x 1.5 inches

Weight : 112.5 Grams

Color : Titanium

This MXDL premium light is well built, and uses the efficient and bright 7 watt LED. Run time is extended while maintaining a magnificent light output. Switching is standard on/off. Lithium batteries prevent loss of power on the shelf or in cold climates. They are available in most stores that carry camera batteries. For the best value, buy a battery kit, which includes two lithium ion rechargeable batteries. Don't forget a charger for the lithium batteries, and a holster for safe storage.