Item Type: Battery Tester Material: ABS Color: As shown in the picture Host Size: Approx. 13x6.2x2.8cm / 5.1x2.4x1.1in Weight: Approx.261g/9.2oz Input Voltage: DC12V Test Items: Voltage, resistance, CCA, battery condition Applicable Object: 12V battery Wide Operating Range : CCA: 100-1700 DIN: 100-1000 IEC: 100-1000 En:100-1700 Battery Life Percentage: 80% - 100% Good Condition 60% - 80% OK, Not Bad 40% - 60% Need Attention 0% - 40% Bad, Need to Exchange Required How to Use 1. Power of the analyzer is supplied by the vehicle battery.For testingthe clinchers of the analyzer should be clinched correctly on the battery during is testing.Red clincher means positive terminal and black clincher means negative terminal which should be clinched correspondingly on the terminals of the battery. 2. Turn on and input a. Press the power button for 1 second b. The screen gets lightening and Bee alarm will emit a "B"sound. The screen shows moving digits, all test indexes and low battery caution index. c. Press "OK"it gets into the step of CCA (Cold Cranking Ampere) value input d. The third digit on the right of the four digits number index blinks, it means the indication digit is changeable by UP(increasing) or DOWN(decreasing) function button. Press the UP(increasing) or DOWN(decreasing) function button until the correct digit shows and move to next digit place for value-input by pressing "SEL". e. The units digit on the right if the four-digits number carries each time 5 units in adding, the other digits carry once an unit in adding. f. After input steps are completed, press"OK", the analyzer will start testing mode for 10 seconds. The Bee alarm keeps emitting "Be"sounds when the testing mode is closed. Press any button to stop the "Be"sounds. If the voltage of battery is too low. the "low"sign at the below left position on the screen will flash, please recharge the battery and test it again.