Description: 0.56 inch DC voltmeter | three line 0-100V digital display digital voltage meter | battery electric vehicle voltmeter 0.36-inch digital tube display, with ultra-small size.Can be used for a variety of voltage measurement purposes. 3-wire system wiring, measuring range 0-100V DC, need an external auxiliary power supply, the power supply has reverse connection protection and does not burn! This DC voltage meter with DC 3.5-30V range It is easy to read, install and use. Specification: Dimensions : Length 48mm/1.89inch x Width 29mm/1.14inch x Thickness 22mm/0.87inch Measuring range : DC0-100V Opening size : 46x27mm/1.81 x 1.06inch Minimum input : DC0V Lead length : 15cm/5.91inch Maximum input : DC100V Allowable error : 1% (+/- 1 word) Display mode : Three 0.56inch LED digital tube Display color : Red Green Blue optional Refresh rate: about 500mS/time Power supply : DC3.5-30V Current consumption : less than 20mA, generally 5-15mA Working temperature : -10°C~65°C Package Includes: 1 Piece DC Digital Voltmeter(2 Pack) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. When the input voltage above 30V,the meter may be permanently damaged.