Features Easy in Testing: Supports auto testing, line on off testing, circuit break point testing, DC and AC power detection and high voltage detection. Wide Test Range: Able to directly test 12‑250V AC and DC circuits, as well as indirect detection of the neutral line, phase line and so on. Smart Operation: Equipped with digital display and indicator light, the voltage detector pen also has alloy steel tip and clamp design for works. Extensive Using: Allows for wide use on the electrical testing of household appliances, automotive, industrial machine and many other equipment. Simple Carrying: Comes with a compact size and a light weight as well, the battery free volt tester pen is very convenient to carry with you. Specification: Item Type: Voltage Detector Pen Material: C45 Steel, ABS Voltage Test Range: 12-250V AC, DC.  Package List:1 x Voltage Detector Pen Note:During testing, do not touch both contact buttons of the test pen at the same time to avoid inaccurate testing. Package List 1 x Voltage Detector Pen