Reverse polarity and overvoltage protection make continuous test of battery power is safe.It is battery detector that provides reliable and accurate operation for larger batteries since it completes a wide range of CCA testing (100-1700).It is made of good quality ABS material, durable to use. It can test and analyze the battery load system, and point out the battery condition including battery life percentage, CCA, battery voltage, and battery resistance to prevent accidental shutdown.The length of this product is 12.5cm, the width is 6.5cm and the height is 3cm.It is very suitable for most cars with 12-volt battery types, working quickly and accurately. Buzzing reminder function makes it more durable and reliable.Item Name: Battery DetectorMaterial: ABSTest Object: 12V BatteryInput Voltage: DC12VTest Items: Voltage, Resistance, CCA, Battery ConditionWide Scope of Work: CCA: 100-1700; DIN: 100-1000; IEC:100-1000; En:100-1700Percentage of Battery Life: 80%-100% in Good Condition; 60%-80% Not Bad; 40%-60% Need Attention; 0%-40% is Bad and Needs to be ReplacedFeatures: Portable, Accurate, ProfessionalSize Details: 12.5cm x 6.5cm x 3cm/4.92" x 2.56" x 1.18" (Approx.)Notes: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.Package Includes:1 x Battery Detector