Convenient and QuickAll-in-one design,a pocket-sized for easy carrying. The tester pen detect 12 to 1000 V AC voltage&48 to 1000 V AC voltage, intelligent recognition to find the breakpoints. | Battery EquippedEquipped with AAA batteries, more convenient to use.The voltage tester pen will auto power off after 3 mins without any operation or signal to save the battery life. | NCV Induction ProbeThe insulation design of the NCV induction probe,stronger and more durable. CAT. III 1000V & CAT. IV 600V,double-layer security level for greater reliability. | Flashlight ModePress and hold the S button to enter flashlight mode for quick circuit fault detection in dim environments. |