For measuring the electrical current in the DC circuit. Used alone or as part of the ancillary panel in low-voltage switchboards, power cabinets, and control houses for DC power transmission and supply systems, as well as various electric control equipment. 2.5 accuracy class (Error Margin = +/- 2.5%). Damping Response Time: Less than 4 seconds. Meter Face Size (Approx): 4.3 x 4.3 x 3.5 cm / 1.69 x 1.69 x 1.37 inches. Specification: Main Material: Plastic, copper wire coil Color: White Size: Approx. 4.3 x 4.3 x 3.5 cm / 1.69 x 1.69 x 1.37 inches Package Includes: 2 Pieces DC Ampere Panel Meter Note: Please allow 1-3 mm error due to manual measurement; ensure you are comfortable with this before purchasing. Due to differences in monitor displays and lighting effects, the actual color may vary slightly from the image.