12V Smart Digital Battery Tester Voltmeter Alternator Analyzer;Provides a quick reading to determine if a vehicle battery needs a jump or replacing Reverse-hookup and Over-voltage protection, safe and simple to use;With a 3-character lighted digital display, easy to read with accuracy Colored LEDs indicate different status of battery or alternator With voice prompt function and very easy operation;The easiest and smartest tester for daily battery and engine system diagnosis Specification: Fit for cars, motorcycles, boats Handy voltmeter makes checking battery and charging system volts easy Reads voltages from 4.00 up to 20.00 volts Works on both 6 and 12 volt batteries With 30amp battery clamps for quick connection With lighter connecting line detection function Colour:Black Material:ABS Package Contents: 1 * Car Digital LED Display Battery Tester 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.