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.Package Content:1 x DC 0-100V Voltmeter Ammeter