Description This voltage tester pen can complete the test without physical contacting, insulation operation the safety of testing. When the voltage is detected, sound and light alarm analog bar of the display screen will become higher or lower with the strength of the sensed voltage signal, the beeping beep will also become faster or more slow with the signal strength. Features - Material: ABS, electronics. - Size: About 17.28X3.80X2.70cm/6.79X1.49X1.06inch. - Scope of application: 12V-1000V. - Battery: 2 AAA batteries (not included). - It is made of high-quality materials and has a long service life. - This voltage tester accurately detects voltage ranging from 12V to 1000V. - The voltage test pen has a flashlight, which can be operated even in a dark environment. - This compact voltage tester can be easily placed into a pocket or a tool box, easy to carry. - Great for breakpoint test. Handy circuit tester for electricians, homeowners. It is made of high-quality materials and has a long service life. This voltage tester accurately detects voltage ranging from 12V to 250V. The voltage test pen has a flashlight, which can be operated even in a dark environment. This compact voltage tester can be easily placed into a pocket or a tool box, easy to carry. Great for breakpoint test. Handy circuit tester for electricians, homeowners.