1) LUX is adjustable for day or night operation: r: When set to the sun position, the sensor operates all day; b: When set to the moon position, the sensor does not operate during the day and automatically enters the operating mode at night. 2) TIME is used to adjust the sensor delay time (5 ± 2 seconds - 4 ± 1 min). The delay time refers to the time it takes for the sensor to turn off after the person has left the detection area after the sensor has detected the person. 3) SENS This is for adjusting the sensor's sensitivity. Generally, no adjustment is required. Main Technical Parameters: Detection Range: 180° Detection Distance: Maximum 12m (25℃) Operating Voltage: AC85-265V (different voltages can be customized). Operating Temperature: –10℃ ~ +40℃ Working Humidity: Less than 93% RH Delay Time: 5 seconds ~ 6 minutes (adjustable) Ambient Light: 2 ~ 2000lux (adjustable) Installation Height: 1.8m ~ 2.5m Material: ABS External Dimensions: 60*47*156mm Installation Method: Open type (16mm hole), during installation, the adjustment knob should face downwards.