Material: PCB Dimensions: 11.99 x 8 x 2.01 cm Power supply: DC5V to 20V Color: white + blue Quantity: 3 Package Contents: 3* Infrared Sensors 1. How to use the HC-SR501 PIR Body infrared sensor module, the PIR motion sensor has a jumper splitter for dual mode operation. Works with any SOC, MCU or even works independently to build fast and pollution free motion activated lights, cameras or w/e 2.Quality This PIR motion sensor is a more energy-efficient and environmentally friendly human detector module, featuring high quality, effective and low heat generation, Long Service Life 3. Smooth operation These are adjustable motion sensors with small useful pots/pots on the board to adjust the on time and sensitivity. They work well and don't need libraries to run 4. The fully automatic sensing should input high level when someone enters its sensing range, and when someone leaves the sensing range, it will automatically delay and close the high level. Output Low Level 5. With induction blocking time (default setting: 3-4 seconds) After each induction output (high level to low level), the induction module can immediately set a blocking time, during which time it is sensed that the device does not receive any induction signal This function can realize the interval work between (induction output time and block output time), and can be applied to interval detection products. At the same time, this function can effectively suppress various disturbances generated in the process of load switching.