Features: Testing can be achieved without physical contact for its NCV Inductive Probe; In testing AC voltage, it can automatically detect the live wire or null- wire; Intelligently identify Electric Field. Adjustable sensitivity makes its measurement more sensitive and flexible;The Voltage Tester Pen has the dual testing range, you can adjust the sensitivity according to your needs (12-1000V AC) Automat When testing the voltage, the brightness bar on the screen will tell you the voltage intensity; The screen will light up in red or green to distinguish the Live/null- Wire. A white LED flashlight with high brightness and low power consumption helps in illuminating the workspace in dark; The lighting lamp and the probe are combined together, convenient for measuring After about 3 minutes without any operation or signal detection, the voltage detector will be automatically shut down to extend the battery life and save energy. Specifications: Alarm Mode: Alert user with led and buzzer sound Torch: White Color Light Zero Line and Live: According to detected single strength Line Determination: to determine it is zero or live wires NCV Sensitivity: Adjust the sensitivity by sensitivity adjustment for key NCV Signal Temperature range: Turn on different led to show out the NCV Detecled Signal strength(weak/middle Istronge) Material: Plastic AC Voltage Detection Range: 12 to 1000V(50/60Hz) Detected Frequency: 50/60Hz Operation Temperature Range: 0~40℃ Altitude: Less than 2000 meter Product Weight:Approx. 65g Size: Approx. 172.8x27.3x38mm/6.8x1.07x1.49in Color: Red, Blue, Yellow Package Includes: 1 Piece ANENG- VC1017 AC Voltage Detector Tester note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!