Builtin flashlight for improved visibility in dark or tight spaces, enabling easier and safer troubleshooting. Multifunctional measurement modes to boost efficiency: Breakpoint checking Live wire measurement Full wire measurement Auto poweroff for safer, batteryfriendly use: Automatically powers down after 3 minutes of no operation or when AC voltage is detected, conserving battery life and reducing risk. Dual sensitivity voltage detection for versatile use: Detect AC voltage from 12 V to 1000 V or from 48 V to 1000 V with the switching s button. Key benefits: Quick and accurate wiring diagnostics, helping to identify issues faster. Flexible voltage range supports a wide variety of circuits and systems. Safe operation with automatic powerdown to prevent unnecessary battery drain. Builtin light eliminates the need for a separate flashlight while on site. Use scenarios: Residential and office electrical troubleshooting: check outlets, switches, and power strips in homes or commercial spaces with confidence. Wiring verification and maintenance: perform breakpoint, live wire, and full wire checks during installation or repairs in panels and machinery. Field service and contractor work: diagnose electrical problems on site where both low and voltage measurements are encountered