The Single Sensor Detective Range
The radar detective range is 0.2 - 4
0 meters back of the sensor, and 0.2-4 meters both side. and this radar could not adjust. but There are 3 levels alarms within 0.2 -40 meters this range, and could adjustment the each level range as your requirement. the first level alarm is only lighting up, the The second level alarm is led and buzzer are Flashing alarm, the third alarm is led and buzzer are working uninterruptedly.