Alerts caregivers to falls with a 95db alarm. Unit attaches easily to walker, bed, or chair with stainless steel clip. Nylon cord 18"-32" adjusts and holds firmly at length needed. Small clip affixes cord to clothing. When magnetic disk is pulled from unit the alarm sounds. Magnetic disk switch is virtually unbreakable. Alarm unit is 3 ¾”H x 2 ½ “W x 2 ¾”D and is encased in a rugged polypropylene case which stands up to even extreme environments. Requires 9V battery (included). Weighs 8oz. One year warranty.