Product DescriptionMaterial: PCBDimensions: 11.99 x 8 x 2.01 cmPower: DC5V to 20VColor: white + blueQuantity: 3 pcsPackage content: 3 pcs * infrared sensor1.How to useHC-SR501 PIR Body infrared sensor module, PIR motion sensors have the jumper breakout for dual-mode operation . Works with any SOC, MCU or can even work stand-alone to build quick-n-dirty motion-activated lights, cameras or w/e.2.QualityThis PIR motion sensor is more energy saving and environmental friendly human detector module with high quality, effective and low heating, long service life.3.Running smoothlyThese are adjustable motion sensors, which have small helpful potentiometers/pots on board to adjust on-time and sensitivity.They work well and do not need a library to run.4.Fully automatic inductionWhen someone enters its sensing range, input high level, and when someone leaves the sensing range, it will automatically delay and turn off 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 set a blocking time immediately, and sense in this time period The device does not receive any induction signal. This function can realize (induction output time and block time) interval work between the two, and can be applied to interval detection products; at the same time, this function can effectively suppress various interferences generated during load switching.