20" x 30" Cordless Bed Sensor Pad With Transmitter included is great for individuals weighing less than 120 lbs. The larger pad covers more area and eliminates false alarms as a result of smaller patients moving around. Place the pad at hip level to know when a sitting patient is trying to get out of the bed or at the upper back level of a patient lying down, to know when they sit up, and before they stand. The Cordless Monitor can be placed up to 50' from the sensor pad. *Note This pad requires a cordless alarm to operate: Model TL-2100G, 433-CMU, or 433-EC. The Transmitter is activated the day your order ships.