Features:     100% Brand New.    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.    Minimum resolution (V): 0.1V.    Refresh rate: ≥500ms / times.    Measure accuracy: 1% (± 1 digit).    Minimum resolution (A): 0.01A.    Operating Current: <20mA.    Measure current: 10A (direct measurement, built-in shunt).    Operating temperature: -10 to 65°c.    Operating Humidity: 10 to 80% (non-condensing).    Mounting cutout: 45.5mm x 26.5mm.