20V-600V AC Non-Contact Voltage Detector Professional Metal Detector Tester
Voltage Sensitivity: 20V to 600V AC
Frequency: 50-500Hz
Metal detection distance: <15mm
Operating Temperature: 32 to 122F (0 to 50degree
Storage Temperature: -4 to 140F (-20 to 60degree)
Humidity: < 85%RH
Battery: 1 * 12V alkaline battery (without battery)