Feature:1. Automatic induction: when entering the measuring range, the output is high, and when people leave the detection range, the automatic delay is off, and the output is low.2. Photosensitive control (optional, not set at the factory) can be set to photosensitive control or non-detecting light intensity during the day.3. Temperature compensation (optional, not set at the factory): when the ambient temperature in summer rises to 30-32 c, the detection range is slightly shorter, and the temperature compensation can be used as performance compensation.4. Two trigger modes: (selectable by jumper)A. No repeated triggering: the sensor outputs a high level, and when the delay time expires, the output will automatically change from high level to low level;B. Repetitive triggering: after the sensor output, the high-level delay, if the human body moves within the detection range, its production will remain at a high level until it changes from high level to low level after delay (Sensor module again checks the measurement to the amount of activity of each human body) automatically extended after the delay time, delay time and start time point of the final event).5. With inductive locking time (default setting: 2.5S blocking time): the sensor module, after each sensor output (high level changes to low level), the blocking time can be set, during which the sensor does not accept any sensor signal. This function can work at intervals between "sensor exit time" and "blocking time", and can be applied to detect interval products; This function can also be suppressed during load switching to cope with various interferences. (This time can be set to zero seconds-tens of seconds).6. Operating Voltage Range: Default voltage DC4.5V-20V.7. Micro power supply consumption: quiescent current "50 microamps, especially suitable for battery-powered automatic control products.8. High-level signal output: it can be easily with different circuits. Specification:Product Model: HC-SR501 Human Motion Detection ModuleOperating Voltage Range: DC 4.5-20V Rest Current: lt; 50uA Output Range: High 3.3V/Low 0V Trigger: L Non Repeatable Trigger/H Repeatable Trigger (Default Repeat Trigger)Delay Time: 5-200S (Adjustable) is (0.xx seconds to tens of seconds)Blocking Time: 2.5S (default) can be set in the range (from 0.xx to tens of seconds)Board Size: 32mm*24mm Angle Sensor: lt cone angle; 100Working Temperature: -15-+70 Degree Lens Size Sensor: Diameter: 23mm (Default)Package Included:1*hc-sr501 Motion Sensor ModuleNotes:1. Due to manual measurement, please allow 1-3mm error.2. Due to the difference of different monitors, the picture may not reflect the actual color of the item. Thanks!