1. Small compact design, faster scanning and direct display of test results. Even a beginner can analyze any 12 volt battery with this device. 2. Fast scan and accurate reading. 3. With 4 main functions for testing 12V & 24V (series) Lead-acid and Lithium batteries from 100CCA to 2000CCA. 4. Clear display & shockproof case - detachable 5. Reverse connection protection. With polarity reverse connection protection, both battery and instrument won’t be damaged.