When using a Wireless CordLess Bed Alarm Sensor Pad with a Wireless CordLess Monitor you are able to remove the alarm noise from the room creating a quiet in room environment for the resident. Bed alarm pad is placed under resident on the bed. When resident gets up from pad, a wireless signal is sent to the monitor setting off the bed alarm to alert caregiver Size 20" x 30". One year warranty. For use with SC TL-433C Economy Cordless fall Sensor and TL-2100G Quiet CordLess Fall Prevention Monitor (sold separately). Please note: All bed/chair sensor pads or floor mats must be connected to a Smart Caregiver Monitor to operate.