Perimeter Security System - Camp Alert Alarm & Survival Signaling System 135 dB Alarm Module with built in Red LED flashlight and side Blue LEDs for signaling. (Note: peel off backing with 3M adhesive for mounting). Two 10M coils of monofilament trip line. Two Blue LED APALS with polished aluminum surface for signaling day or night. Two Nylon Zip Ties for securing alarm module to a branch or stake. An 8 strip of 100MPH duct tape for multi-purpose use.