Features: Brand new and high quality The intelligent sensing technology of this electrical tester pen enables quick and accurate detection of circuit, ensuring safety and convenience. With multiple functions, this tester pen can measure voltage, current, frequency, and more, providing comprehensive circuit testing capabilities for various electrical needs. Designed for electricians and DIY enthusiasts, this tester pen is a must have tool for electrical maintenance, installation, and troubleshooting. Whether it's testing home circuits, conducting electrical installations on construction site, or performing experiments in school laboratories, this tester pen is versatile and reliable in any scenario. The high sensitivity and easy operation of this tester pen make it an essential companions for professionals and hobbyists alike, ensuring accurate circuit assessment and safe electrical practices. Specifications: Material:ABS Voltage: 12V-1000V Voltage detection ranges selection: the default voltage detection ranges when the tester is turned on: about 48-1000V Technical support: 2x AAA battery 1.5V (not included） Frequency: 50Hz/60Hz Size:Approx.16x2.3x2.6cm/6.3x0.9x1.02inch Package Includes: 1x Voltage Detector note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.