Features 1. Automatic induction: Outputs high when entering the sensing range, automatically delays turning off the high output and switches to low output when people leave the sensor range. Ultra-small size. 2. Repeatable trigger: When the sensor outputs high, if there is human activity within its sensing range during the delay period, the output will remain high. The high output switches to low after people leave with a delay. The sensor module automatically extends a delay period after detecting each human activity, and the last activity event is the starting point of the delay time. 3. Wide operating voltage range: Default operating voltage DC4.5V-20V. 4. Micropower: Quiescent current less than 50 microamps, for battery-powered automatic control products. 5. Output high signal: For docking with various circuits. Applications 1. Body induction 2. Body sensor toys 3. Security products 4. Industrial automation and control 5. Auto-sensing electrical equipment 6. Battery-powered automatic control Specifications 1. Operating Voltage Range: DC4.5-20V 2. Static current: Less than 60uA 3. Output level: High 3.3V / Low 0V 4. Trigger: repeatable trigger (default) 5. Delay time: Default 8S ±30% (customizable range from a few tenths of a second to tens of minutes) 6. PCB Dimensions: 10 x 23mm 7. Induction angle: Less than 100 degree cone angle 8. Induction distance: 3 meters 9. Working temperature: -20- +80 degrees 10. Sensor Lens Dimensions: Diameter 40mm x 10mm 11. Material: PCB, metal 12. Colour: green Package Contents 10 x SR505 Mini sensing module compatible with related induction devices