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