Excellent tool to monitor the movement of an individual suffering from Alzheimer's or dementia, or someone who is at risk of injury due to falls. Use with one of Smart Caregiver's cordless/wireless alarm monitors, models 433-EC, 433-CMU, 433-CMU-40/60, or TL-2100G (all sold separately). One year manufacturer warranty. After warranty expires, replacement battery/transmitter, model TM-FM, can be purchased separately.