Dimensions (L) 48 x (W) 29 x (Thickness) 22mm;

Measuring range: DC 3.2~30V;

Hole size: 46 x 27mm;

Minimum input voltage is below the minimum measurement inaccurate or does not show;

Maximum input DC 30V (above this voltage burn danger);

Display 0.56 "LED 3-digital tube;

Display color: red;

Refresh rate of about 500mS / times;

Power supply: No power supply;

Operating temperature: -10'C~65'C