Features: Advanced Detector with Insulated Grip & LCD Backlit Display for Safe Electrical Testing. Features NCV voltage tester with color code alerts and neutral line identification for precise circuit diagnostics. For electricians, DIY enthusiasts, and maintenance professional requiring reliable voltage detection tool. Optimized for dark environment, residential wiring inspections, and industrial panel troubleshooting with backlit display. Combines shock resistant construction with multifunctional testing capabilities including live wire verification. Specifications: Voltage ranges: contactless measurement: 30v-1000v Contact measurement: 11v-450v Frequency: 50-60Hz Battery: 1pc Battery Requires (battery NOT included) Alarm method: screen backlit color change + alarm Neutral line distinction: YES Screen backlit: YES Battery undervoltage indication: When the "lo" is displayed on the screen during use, it indicates that the battery power is not enough to drive the pen to work, and the battery needs to be replaced at this time. Pattern: 2 pattern optional Color: Red/Yellow Package Includes: 1pc Digital Measuring Pen note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.