1[Automatic Detection] Intelligent identification of the live wire and the neutral wire, automatic detection, sound and light alarm, making the operation more convenient. 2[High Accuracy] With LED light, no fear of darkness, NCV sensor head, make the measurement more accurate. 3[High Sensitivity] Just adjust the sensitivity (low, medium, high) by adjusting the sensitivity button to measure the voltage. 4[Automatically Shut Down] Voltage tester will automatically shut down when there is no operation for 3 minutes and no voltage signal is detected. 5[LCD Screen] Electric tester pen with LCD screen, AC high voltage sign, low power reminder, distinguish empty line or real time line, and use 2 x AAA batteries (battery not included). Item Type: Non Contact Voltage Detector Material: Plastic Product Model: RuoShui 10 Measuring Voltage Range: AC voltage 12-1000V, 50/60Hz Working Temperature: 0-40 Storage Temperature: -10-50 Humidity: 95% Height: 2000m Security Compliance: CAT. III 1000V CAT. IV 600V; CE Detection Distance: Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.