Made of 6061 Aluminum, this unit utilizes a spring-loaded firing mechanism and a trip trigger. When the trigger is disturbed while loaded with a Flash Bang, the unit will discharge. This device is compatible with flares and pepper gas depending on situation and requirement. * Flash Bang Not Included What's Included (1) FithOps Perimeter Trip Alarm (1) Trigger Pin (1) Pull Ring Product Specifications Weight: 3.5 oz Dimensions: 3" H x 1" W x 1" L Material: 6061 Aluminum Color: Military Green Packa