This easy to use belt sounds an alarm and flashes a light the moment the buckle is undone. The alarm has a convenient on/off switch, low battery light, and has grommets for using bolts to attach it to a chair. A mounting bracket is included to hold the alarm. The unit uses one 9V battery and has additional foam pads in the belts to provide extra comfort and protection. The belt fully extends to 50” end to end.