(1) Motion Sensor-transmitter for extra windows and doors. DA2T (extra sensor), is a wireless magnetic sensor/ transmitter that sends a signal to a remote receiver. Used for closed door, window or medicine cabinet to assist the professional caregiver or home care relative, that the elderly care patient requires attention. The DA2T sensor activates only when the door is opened and does not activate when the door is closed or left open. Ideal solution for doors, windows or medicine cabinets that are always closed.