ITEM NAME:0.28inch LCD Two Wire 2.5-30V Red LED Digital DC Voltmeter Panel Meter Product Description Description: 100% Brand new and high quality precision automatic adjustment ,when less than 10V accurate to 0.01V, more than 10V accurate to 0.1V Two wire connection, with reverse polarity protection Display color: Red, yellow, green, blue Two-wire Measurement range: DC 2.5-30V, 2.7-30V, 3-30V Min. input voltage: DC 2.5V, 2.7V, 3V Max. input voltage:DC 30V(Higher than this voltage is has a risk of overburning) Permissible error: 1%(Â ±1 digit) Display mode: three digit 0.28'LED digital tube Size: 3.30 x 1.10 x 0.70cm (L*W*H) Speed ratio: about 200ms/time Current Consumption: