Non Contact Voltage Detector: The default AC voltage tester measurement range is 48-1000V, it can also measure 12-1000V by adjusting the sensitivity. Practical and convenient way to test electrical lines High Low Sensitivity Electric Pen Tester: Ideal voltage tester allows automatic selection of 3 kinds of sensitivity (High,Medium,low). Live/Neutral wire distinguish at close range Visible Audible Alarm for Contactless Voltage Tester: Audible and visual alarm always guard your safety. Using the ABS and PVC material, the Voltage Tester can stand wear and tear, and its pocket clip allows easy handling Easy Electric Pen Tester: Auto power-off feature conserves energy. While the LED torch allows operation even on dark corners. The shining prompt of low voltage LED can warn you to replace the battery in time Multi-Function Voltage Tester: Using the ABS and PVC material, the Voltage Tester can stand wear and tear, and its pocket clip allows easy handling; We provide a 18-Month after-sale service, Please feel free to contact us if you have any concern