Once the magnetic pull-switch is removed, the patient alarm sounds on this tamper-proof pull-cord alarm by Drive Medical. The pull-switch, which includes a convenient On/Off switch, activates from any direction and adapts to various situations with a cord that adjusts from 28" to 58". The unit mounts easily on a bed or wheelchair even on a patient\'s clothes thanks to an alligator clip. Volume adjusts from 85 to 95 dB on the alarm, which requires one 9V battery. The product has a 1 year limited warranty. Note* Not recommended for use by pacemaker patients.