This wireless sensor is most suitable for locations where the position of the sensor and the aircon is far apart. This wireless sensor will commmunicate with a wireless receiver and the latter will send an infrared signal to the aircon to turn it on and keep it on. As long as the sensor detects movement, the receiver will keep the aircon on.
One application is to place the sensor on your table, so that small movements of your hands during typing and moving of the mouse will activate the sensor and keeps the aircon switched on.
If you want to deactivate the sensor, simply turn the sensor to face away from you and being unable to detect movement, the sensor will deactivate the aircon. Simply, leaving your room will also deactivate after the preset timing.
Some people encountered inconveniences when a sensor was placed on the ceiling because the sensor was unable to detect minor movements of the hand while he was operating a computer and may switch off the lights after a preset time of "no motion".
A table top, battery operated wireless sensor will be able to detect small hand movements.