The digital amp gauge is easy and quick for you to install and disassemble, without much extra tools, saving your time and effort. It is convenient to store in a tool box or storage room when you do not use it, not taking much space. The volt ampere meter can be widely applied by electricians or technicians for industrial assembly lines, solar systems, automobiles, cars, RV and more, to test batteries, DC electrical appliances, pipeline and so on, meeting your various using purposes. Screen display: red blue mainly Size: Meter: about 1.88 x 0.8 x 1.1 inches Power cord: about 4.7 inches long Voltage measuring range: DC 0-100 V Current measuring range: DC 0-10 A Package includes: 6 x Digital voltmeter ammeters 1 x Connect wires kit Colour:black Material: ABS Package Contents: 1 set x Digital voltmeter ammeters Note: The wiring order should not be wrong. The load should not exceed the rated power This meter has the power supply range of 4 V-30 V, the maximum input voltage does not exceed 30 V, to avoid the burning risk. Measurement error: 0.1 percent for voltage and 1 for current. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. szrh21Black