Whether you are home, displaced in the woods, or in a foreign building/structure – First warnings are imperative so you have an edge on your intruders.

For under $5, you can grab one of these 120dB alarms and modify it into a trip wire.

GE Pull Pin Alarm on Amazon

#12 Bank Line – 400 feet, 100 lb static tensile strength

On Point Bank Line Article – https://www.onpointpreparedness.net/bank-line-the-cheaper-paracord-alternative/