NEW! COVID-19 Products
These 2.75" h x 2.25" w x 1" d cabinet alarms are available in red or white and install in seconds without tools using a self-adhesive back. The metal prongs slip under the extinguisher and are held closed by the weight of the extinguisher. When the extinguisher is removed from the cabinet, the prongs spring open as shown here, causing the 105 decibel alarm to sound.
The required 9 volt battery is not included, sorry.