BT201 is a 12V car battery tester, suitable for car owners and car maintenance technicians.The battery tester can quickly read important car battery data, such as voltage, internal resistance, cold cranking current and battery capacity, battery health and state of charge.The ability to test results, calculate the battery's cold-cranking capability and age, allowing for faster and more precise vehicle repairs.The BT201 can detect ordinary flooded batteries with a capacity of 100-2000 , flat plates, spirals, and batteriesDisplay: 128*64Function button: UP,,OK,ESCOperating Temperature: -20 to 60 Temperature: -20 to 70External : 12VSupport Language: English, German, French, Portuguese, Italian, Russian.Note:This product is suitable for 12V car -up battery, theworking voltage is DC9~18V, please do not it to testlithium battery.color:BlackMaterial:ABSPackage Contents:1 x Car Diagnostic Tool1 x English manualOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.