The Electric Non-contact Pen Tester allows you to test AC/DC 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: Induction Detection: in-built sensor, it will flash green light and alarm you when it detecting the AC voltage. Zero/Live Wire Detection: insert the pen into the socket to detect zero/live wire, green light flashes and sounds up when detecting live wire. Breakpoint Detection: moving pen along with the wire, sound and light alarm will stop once there is breakpoint. Safety Guarantee: made of ABS insulating material to prevent electric shock hazard, greatly improved security levels. H/L/O Detect Range: three gear to choose from according demand for detecting Fire-Neutral line/Continuity/Battery/Non-contact AC Voltage detection. Multifunctional Induction Test Pencil: sound and light alarm, low power consumption, compact design, safe to use and easy to carry. Practical 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: Material: ABS Detect Range: H(high induction), L(low induction), O(high induction with direct contact) Sound/Light Alarm: Yes Power Supply: 2 * AG13 battery Item Size: 141 * 18.6 * 16mm / 5.55 * 0.73 * 0.63in Item Weight: 22g / 0.78oz Package Weight: 35g / 1.23oz Package Size: 20 * 9.3 * 2cm / 7.87 * 3.66 * 0.79in Packing List: 1 * Electric Voltage Tester Note: Please allow 1-3mm error due to manual measurement. Color may be slightly differ from the pictures shown due to photograph light, the display monitor or other reasons. Please in kind prevail. Thanks!