BPB-365 bed sensor pad 10″x30″ in size, made of a soft vinyl, incontinence resistant and easy to wipe clean. . Place the bed sensor pad 30 inches across the width of the bed, under the fitted sheet. Position the pad under the patient’s shoulder blades, alarm will sound when they sit up or place it under the hips, alarm will sound when the resident is lifting out of the bed. When pressure is removed from the sensor pad the alarm will sound to alert the caregiver that someone is attempting to get up without assistance. Bed alarms are not designed to prevent falls, only as an alert to the caregiver when the patient is trying to get out of bed. Seller accepts no responsibility for end user misuse or faulty product , but will replace the items should they be defective.