This complete package includes a Long Term (1 Year Warranty) Bed Sensor Pad and a caregiver alarm, which can be up to 100' away from the bed pad, allowing the caregiver to move freely around the home, ensuring that they will hear the alarm as soon as the patient starts to get up, day or night. By placing the sensor pad under the patient's back area or buttocks, you will receive the earliest possible alert that the patient is getting up. The alarm features three volume settings, and an on/off switch. This simple to use system provides a more comfortable and less stressful environment for the patient than traditional in-room alarm bed alarm systems, as they don't hear any distressing alarm noise. The caregiver will hear the alert within seconds of the patient sitting up or moving towards the edge of the bed. Pads are sealed for incontinence protection. Alarm operates on 3 C batteries (not included) but to use less batteries over the life of your products, consider purchasing the compatible AC Adapter AC-04EC (12 volt).