The Rc-300 Is A Portable, Fully Featured Tester That Provides Quick And Accurate Results Utilizing Autometers Award Winning" Digital Pulse Load" Technology. The Rc-300 Is Uer Friendly, Instructing The User Exactly What To Do While Testing An Sla Battery. Professionally Accurate Test Results Are Shown On A Lcd Display After Each Test. The Rc-300 Has A Built In Memory So You Can Easily Review And/Or Print Test Results.