Schumacher BTF-250 12V Digital Battery and System Tester Microprocessor controlled for an easy and accurate load test with no need to time yourself Bright, three-color, LCD digital display indicates both voltage and test results Unique five-step design indicates OK, OK & Recharge, Recharge Battery, Recharge & Retest, and Bad Cell Error LED indicates reverse hook-up Includes heavy-duty and color-coded super-grip battery clamps