Schumacher SC-1200A functions as a charger, maintainer and tester with fully automatic microprocessor control. With 12Amp fast charge, it monitors battery condition and adjusts charge rate downward to prevent battery damage. With 8 Amp medium charge, it self-adjusts charge rate and keeps the battery in peak condition. 2 Amp slow charge to charge small and maintain large batteries. 50 Amp clamps are used for the top and side-mounted battery posts. This charger also features electronic push button control switches for different selections of display mode, charger rate or battery type. It also features a retractable handle for easy portability and storage.