Guardian, Dual Function, Blue LED - Essential Gear Lighting Guardian, Dual Function, Blue LED Lighting : Guardian Essential Gear - Lighting - Handheld Batteries Included : YesBulb : LED, BlueBurn Time : Up To 250 HoursCarry System : ClipFinish : Black/BlueMaterial : Polymer/PolycarbonateOutput (lumens) : 1.8Overall Length (inches) : 2.4Power Source : CR2016 Lithium, x 2Special Features : N/ASubmersible : Water ResistantSwitch : Twist On/OffExtremely Lightweight, Waterproof Up To 300" (100 Meters)Twist Lens to Turn On or OffVisible up to 2 Miles From Front View (Visible Over 1/4 Mile From Side View)Long Battery LifeSteady-On Mode = 100 hoursFlashing Mode = 250 hoursBuilt in loops allow Guardians to be threaded onto most belts, leashes, or other strapsWorks From -40" to 50" C (122" F)Case, clip, and lens material made from high impact and scratch resistant thermoplasticCan be attached through the built-in belt loops, with heavy-duty clip or magnetic base (not included). Tags : Essential Gear,Lighting,Essential,Lighting - Handheld