1. Controlled by large-capacity single-chip, stable and reliable;

2. Offers a wide range watchdog circuit, eliminate the phenomenon of dead halt

3. A variety of operation choices, two national standard GB1986/GB2002 method and customized operation to meet different needs of users

4. One-time-forming glass cup, no oil leakage

5. Unique high voltage sampling instrument design allows test values directly into the A/D converter, to avoid errors in analog circuits, and measurement results more accurate;

6. Over voltage, over current, limit and grounding alarm functions

7. Portable, easy to carry, convenient to use inside or outside doors