Radio Shack 15-Range Digital Multi meter (Cat No. 22-810) is a portable, compact multi meter that is ideal for field, shop, and home applications. It has 3½-digit digital display, and measures AC and DC voltage up to 500V, and resistance up to 2MΩ. Features: Diode Check Function —Low Battery Indicator—Auto Power Off —Full Auto Polarity Operation —UL Listed. Note: Black probe end is not connected to the instrument cable.