KONNWEI KW650 battery tester is the newest battery tester upgraded from the black white screen tester, in order to check battery health faster and more accurate, including check the alternator working status. Not only support Battery Health Test, but also Battery Cranking Test, Battery Charging Test.It's a professional automotive diagnostic tools for your battery issues by the graphing voltage monitoring tool, with its 2.4 inch color screen and unique pattern design, the KONNWEI KW650 is a perfect battery testing tool for you. Advantages: Imported STM32103VCT6 Chip. Graphical battery test results. U-I waveform, also can be printed out Test results storage and review. Battery report can be printed out on PC. Support free update online life time. Support battery type: Regular flooded battery, will support AGM flat plate battery, AGM spiral battery, GEL and EFB battery in the future after updating. Battery Standard: CCA:100-2000/BCU: 100-2000 / CA:100-2000 / MCA:100-2000. JIS:26A17-245H52 / DIN:100-1400 / IEC:100-1400 / EN:100-2000 /SAE:100-2000. Specification: System Voltage: 6-16 Volts. Input Voltage Range: 6V-16V. No internal batteries required. Operating Temperatuer: 0 inches-50 inches. Gas storage temperature: -20 inches-70 inches.