Smart Caregiver Economy Central Monitoring Unit Window and Door Sensor Transmitter 2 Pack is a door and window sensor that alerts the caregiver when the patient opens either the door or window. When the window or door opens and the contact magnet and is separated from the sensor, the wireless signal is then sent to the Economy CordLess Alarm to alert the caregiver the user has opened the door or window. The Smart Caregiver Economy Door Sensor Transmitter can be mounted to a window or door frame using the provided mounting hardware or adhesive tape. This bundle includes two of the Door Sensor Transmitter that allows you to have it mounted in different parts of your home where you see fit. This is to ensure any exit you have is equipped with the door sensor to notify the caregiver if the patient has gotten up. PURCHASE INCLUDES: (2) Smart Caregiver Economy Central Monitoring Unit Window and Door Exit Transmitter, & (1) Liberty 7 Day Pill Case