Gardner Bender GMT-312 Multi‑Tester is a versatile, pocket-sized analog multimeter designed for both professionals and DIYers — making it a reliable tool for electrical diagnostics. It measures five critical functions: AC/DC voltage, DC current, resistance (and continuity), plus battery testing — all selectable via a 13-position rotary dial. Its color-coded, easy-read analog scale and manual zero-ohms adjustment make taking accurate readings straightforward, while replaceable test leads and built-in fuse/overload protection increase both safety and longevity. Compact and rugged, it’s ideal for quick checks on household wiring, appliances, automotive systems or electronics — a simple but powerful instrument for troubleshooting and repair.