PD-PIR601B: The product is a new type of energy-saving lighting switch that uses high-sensitivity detectors; it integrates automation, convenience, security, energy saving, and practical use; a large-scale detection area is composed of upper and lower, left and right service areas; it uses the infrared energy emitted by the human body As a control signal source, when someone enters the detection area, the controlled load can be started immediately; it can automatically identify day and night; it is easy to install and has a wide range of use.