The Electric Non-contact Pen Tester allows you to test AC voltage, breakpoint, continuity, battery, leakage detection, etc. It is made of safety materials with sound and light alarm, perfect for electrician to test power cables, circuit breakers, wall sockets, junction boxes, fuses, etc. Features: Non-contact Detection: when the electric test pen detected the AC voltage, the screen will display red and full signal, and beep sounds up to alarm you. Sensitivity Adjustment: you can adjust the high or low sensitivity by the "S" button. The green backlight is low sensitivity, while the yellow is high. Fire/Zero Wire Detection: insert the pen tip into the socket to detect zero/live wire, red backlight flashes, the LCD signal is full and beep sounds up when detecting live wire. Breakpoint Detection: moving pen along with the wire, sound and light alarm will stop once there is breakpoint. Partition Wall Measurement: safely contact the electricity to check the on-site installation line troubleshooting, maintenance and safety factor improvement. Reliable Quality: durable ABS material compact designed is easy to carry, inbuilt with smart motherboard that ensures the stable performance. LCD Digital Test Pen: high-definition LCD screen with backlight, you can check the data clearly. Flashlight Lighting: auxiliary illuminating the working area during night or in the darkness. Wide Application Test Pen: perfect for testing power cables, circuit breakers, wall sockets, junction boxes, fuses, etc. Really a professional tool for electrician, home, office, electric industry, and more. Specifications: Color: Blue / Red / Yellow (Optional) Material: ABS AC Voltage Range: 12~1000V, AC50/60Hz Power Supply: 2 * 1.5V AAA battery (NOT included) Item Size: 172.8 * 38 * 27.3mm / 6.80 * 1.50 * 1.07in Item Weight: 43g / 1.52oz Package Weight: 67g / 2.36oz Package Size: 19.5 * 4 * 3cm / 7.68 * 1.57 * 1.18in Packing List: 1 * Test Pen