Each "Pull String Alarm" has a 4-6" string on each side of a 1-1/2" charge.
Rig them to a door and when opened the alarm will sound with a "BANG".
"Jerk" the string out of the ends and "BANG".
Each box holds 12 alarms.
You get 144 boxes for a total of 1728 alarms.
These are great fun for gags and pranks. Rig one up to an office chair at work and when its pulled out "BANG". Put one inside a drawer and when its opened "BANG". Let your imagination go wild and have some fun.