AC/DC Voltage Test Pencil 12V/48V-1000V Voltage Sensitivity Pen Detector Features:Automatic shutdownWhen the test pen does not receive any operation within 5 minutes and does not detect the AC voltage, it automatically turns off.Acousto-optic discrimination of Live or Null Wire:- Live Wire Testing:When the sensor end of the measuring pen is close to the object to be measured, the fast-paced buzzing alarm of the tester gives out an alarm sound, and the screen flashes red light, indicating that the test is a LIVE WIRE.- Null Wire testing:When the sensor end is close to the object to be measured, the slow-paced buzzer alarms, and the display screen flashes green light, indicating that the tested line is Null Wire. This product has more comprehensive functions:✓Large Range Measuring✓For testing AC Voltage✓Recognition of Live/Null Wire✓Triple alarm of sound, light and screen✓Energy-saving and bright LCD screen✓High and Low Voltage Signal Indicator✓Buzzer alarm - loud and sensitive✓White LED lighting - - energy saving, convenient✓Auto power off✓Switch key✓Good Sensitivity of NCV Sensor Technical Specifications:►Dual Range of AC Voltage: 48V-1000V/12V-1000V►Frequency: 50Hz / 60Hz►Alarm Mode: Sound and light alarm►Electric Torch: LED illumination►Low-voltage indicator lamp: Yes►Power Source: 2 x 1.5V AAA Batteries(not included)►Security Level: CE CAT. III 1000V / CAT. IV 600V►Service Temperature: 0-40℃►Storage Temperature: -10-50℃►Altitude: <2000m►Safety Compliance: CAT.III 1000V CAT.IV 600V; CE Package Contents:1 * Lomvum Non-contact Voltage Tester Compact Pen1 * User Manual