Sense Chair sensor consists of sensor (chair mat) which connects to the sense MBox radio device. The sense mat is placed under the cushion on a seat or wheelchair. 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