Display Color: Red and blue LED (double display). Display: 0.28-inch LED digital. Operating Voltage: DC 4.5 ~ 30V. Measurement Voltage: DC 0 ~ 100V. Minimum Resolution (V): 0.1 V. Update Frequency: 500 ms per cycle. Measurement Accuracy: 1% (± 1 digit). Minimum Resolution (A): 0.01 A. Operating Current: Less than 20 mA. Measurement Current: 50 A (shunt must be connected) Operating Temperature: -10 to 65°C. Operating Humidity: 10 to 80% (non-condensing). Color: Black Material: Metal Package Contents: 2 x Voltmeter Ammeter 2 shunts 50A 75mV Only the above package contents are included; other products are not part of the set. Note: Light reflection and different screens may cause the color of the object in the image to differ slightly from the actual product. The allowable measurement error is +/- 1-3 cm.