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 10 Bricks, each 144 boxes of 12 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.