Once the magnetic pull switch is removed, the alarm sounds on this tamper-proof magnetic 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 and even on a patient's clothes thanks to an alligator clip. Volume adjusts from 97 to 103 dB on the alarm, which requires one 9V battery included . The product has a 1 year limited warranty. Features When magnetic pull switch is removed, alarm is activated. Pull switch can be activated from any direction. Convenient On/Off switch for easy activation and deactivation. Easily mounts on wheelchair or bed. Cord Adjusts from 28 to 58 . Alligator clip allows for attachment to patient's clothes. 97 103 dB One 9V battery included. Comes with screwdriver to remove battery cover Warranty Limited 1 Year. 1 Each / Case