Size: 48mm x 29mm x 21mm. Display color: Red & Blue LED (dual display). Display: 0.28″ LED digital. Operating voltage: DC 4.5 ~ 30V. Measure voltage: DC 0 ~ 100V. Measure current: 1A~10A (direct measurement, built-in shunt). Minimum resolution (V): 0.1V. Refresh rate: ≥100ms / times. Measure accuracy: 1% (± 1 digit). Minimum resolution (A): 0.01A. Operating Current: <20mA Operating temperature: -10 to 65°c. Operating Humidity: 10 to 80% (non-condensing). Mounting cutout: 45.5mm x 26.5mm.