NANO W12 microwave motion sensor, a new energy-saving switch, adopts a microwave sensor with high-frequency electromagnetic waves (5.8GHz) and an integrated circuit. It gathers automatism, convenience, safety, saving energy, and practical functions. The wide detection field depends on detectors. When one enters the detection field, it can start the load at once and identify automatically day and night. Its installation is very convenient and its using is very wide. Detection can go through doors, panes of glass, or thin walls. This is an ultra-reliable sensor, especially as there are no gaps in the detection zone.