Detected object range: Minimum object is stud, staple, measured area: 20-50mm 1.Power: 9V 2.Work Accuracy: less than 50uA 3.Work Voltage: DCV7-9 4.Work Frequancy: 95KHz 5.Work Temperature: -5°C - 40°C 6.Material: ABS and black shell 7.Detected object range: minimum object is stud, staple, measured area: 20-50mm 8.Alarm way: acousto-optic at the same time, the sound has high-frequency tone when ...