HC-SR505 small human body sensing module is based on infrared technology Automatic control products, high sensitivity, strong reliability, ultra-small size, ultra-low voltage operating mode. Widely used in various types of automatic induction electrical equipment Especially automatic control products powered by dry batteries. Fully automatic sensing: when a person enters its sensing range, it outputs a high level.<br><br>When leaving the sensing range, it will automatically delay to turn off the high level and output low level. Ultra small size. Repeatable triggering method: that is, after the sensor outputs a high level, during the delay During the interval, if there is a human body moving within its sensing range, its output will It remains high until the person leaves and then delays the change to high level. is low level (the sensing module will automatically automatically postpone a delay period and start the activity in the last zone time is the starting point of the delay time). Application scope: Human body sensor lamp mouth human body sensor toy Security products industrial automation control Automatic induction electrical equipment, battery-powered automatic control, etc. The appearance and color of different batches of products may be different, which will not affect the use. Colour:green Material:PCB<br><br>Package Contents: 10 x Module<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.