The ZOYI ZT-S1 Digital Multimeter is a compact and user-friendly tool for electrical testing. With a 4000-count display, it provides accurate measurements for AC/DC voltage, current, resistance, and continuity. Features like True RMS ensure precise readings, while auto-ranging makes operation simple. Additional functionalities include non-contact voltage detection (NCV) and a backlit LCD with a flashlight for working in dim environments. Safety-rated at CAT II 600V, the ZT-S1 is perfect for professionals and DIY enthusiasts who need a portable, reliable multimeter for troubleshooting electrical systems.