In this video Aaron Cowan from Sage Dynamics goes over the Streamlight TLR1 HL Weapon Mounted Light.

The Streamlight TLR-1 HL Weapon Flashlight is a lightweight, compact, high lumen lithium battery powered Gun-Mounted Tactical Light featuring the latest in shock-proof power LED technology and providing 1.75 hours of continuous run time.

Tethered battery door and latch mechanism prevents battery door loss while providing easy battery replacement. Rail clamp designed to rapidly attach/detach from side of weapon. When enabled, strobe activated on two or more momentary paddle hits.