Features: Accurately detects voltage ranging from 9V to 1000V. 4 standards- for your option: ncv- pen/upgraded pen/digital pen/audio- pen. Dstinguish the live & Null- wire through different frequency alarm sound. Moving pen along with the wire, sound and light alarm will stop once there is breakpoint-. Lightweight, durable construction with convenient pocket clip, a perfect handy tool for electricians or daily use. Specifications: Material: Plastic Standard: ncv- pen/upgraded pen/digital pen/audio- pen(optional) Range: 9V to 1000V. Powered- by 2x AAA- battery(included) Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Electrical Tester