Tough impact resistant plastic housing with easy grip rubber booth that prevents damage to the unit.. The RC-300 enables the user to" blue print" known good batteries of different types/sizes to drive improved testing accuracy.. The unit will store up to 40 different" blue printed" battery types.. Kit includes AutoMeter PR-20 add-on thermal paper printer specifically designed to enhance AutoMeter Electrical System Testers by providing instant hard copy results and credibility.. Tests SLA Flooded Gel Cell or AGM batteries. Also tests discharged batteries and detects bad cells.. Applies a true 40 amp load during testing to simulate real world operating conditions and provide more accurate test results.. Tests 6V and 12V batteries rated between 4AH - 50AH.. Stores the last 50 tests in memory. Test Results Include: Batterys Measured Amp Hour (Ah) Capacity Battery Voltage And Percent Of Charge And What The Batterys State Of Health Is (Good Near End Of Life Or Bad).. 30" - 16 gauge leads. Customer communication with optional PR-12 (external printer) PR-20 (bolt-on printer) or AC-12 (PC cable).