Bed Or Chair Pull Cord Patient Alarm is an economical way to notify staff that a patient has moved. Alarm easily secures to a bed or chair with a self contained clip. Activation cord is adjustable from 18 to 36. When user gets up, the pin connector pulls from the alarm unit activating the signal. Deactivate with On/Off switch. Requires 1 9V Battery. 1 Year Limited Warranty. Alarm sounds when pin is pulled from unit! Two volume settings: 85 dB and 100 dB.