NanhoElectronics DC 4.5 -30 Volt 0.56 Inch Green LED Display Voltmeter Voltmeter  (Digital)

Display Color: Red/Green/Blue Measure Voltage: DC 4.5/4.7/5V-30V two-wire access Display: Three digit 0.56" LED, Green color Refresh Speed: Approx.300mS/time Highest input:DC 30V (higher than 30v has the risk of burn up) Minimum input:DC 4.5/4.7/5VV(below than 4.5/4.7/5VV,measurement is inaccurate or does not show) Minimum Resolution:0.01V(<10V)/0.1V(>10V) Resolution:1%±1digit Working Temperature:-20?~65? Size:Approx. 48mm x 29mm x 22mm(L*W*H) Hole Size: Approx.46*27mm Current Consumption:<23mA Package Included: 1 x Digital Volmeter