1Test and analyze battery load system, indicating battery condition include battery life percentage, CCA, battery voltage,battery resistance. 2Continuous test with battery power, no damage to battery, and the reverse polarity and over voltage protection make it to be ultra safe. 3Complete wide CCA test range (100-1700), offer reliable and accurate operation for more sized batteries. 4Great compatible with most 12 volt battery type(include Flood battery, AGM battery, Gel battery, Deep Cycle Battery), work fast and precisely. 5Come with large LED screen and heavy duty clamp, and beep remind function make it to be more durable and reliable. 6With compact shape, stable performance, shockproof, lightweight and portable, take up no space and you can put it anywhere.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 Condition60% - 80% OK, Not Bad40% - 60% Need Attention0% - 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. 1 x Battery Tester 1 x Instruction Manual 1. Please allow 1& 8209;2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.