Features: Measure DC 3.5V~35V directly (two wires Access), do not need extra power source. Three position 0.36 inch LED display, very bright and clear. Compact design and well made. Very nice to check the voltage and charging system on cars. A small calibration adjustment, can be adjusted according to need. Specifications: Material: Plastic + Electronic Components Model: PZVM-001 Measuring Range: DC 3.5V~35V(Reverse polarity protection) Measuring Error: 1%(Come with small calibration adjustment, can be adjusted according to need) Input Impedance: 1M Max. Working Current: 18mA Refresh Rate: 25Hz Display: Three Digit 0.36 Inch LED Display Working Temperature: -30 ~ +70 Display Color: Red, Yellow, Blue(Optional) Lead Length: Approx. 15cm / 5.91inch Size: Approx. 3.6 x 2.2 x 1.8cm / 1.4 x 0.86 x 0.7inch Weight: 17g Package Included: 1 x DC Volt Meter Note: Please check the size measurement chart carefully before making a payment. Please allow 0.1-0.5cm difference due to manual measurement. The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding.