Sense bed alarm consists of a sensor (bed mat) which connects to the sense MBox radio device. When the sensor activates an alarm is sent to carephone. The sense alarm provides automatic monitoring of battery & sensor function. On the main unit a simple function provides the ability to set different delay times before the alarm is sent for example if the client was to exit the bed & not return in 15 minutes. Time parameters can also be programmed so that the device will only work within certain times of the day for example between 9.00pm & 6.00am. Please note this device is compatible with Care Tech systems only. Important note: This sensor is only compatible with Care Tech Carephones.