1.Support 10 Mode full OBD2 Engine Scan. (Read and clear error in engine, live data let u know engines status all the time.) 2.Testing Battery Status. (To know voltage, cranking test, load test, Charing Test and so on.) 3.OBD2 Scan & Battery Test 2 in 1. (KW681 support to scan engine and battery both, just use an extra connector then u could use these two functions, dont need to buy two devices.) 4.Support 6V Motorcycle & 12V Car Battery both. (Battery Test could be used in 6V and 12V both, KW681 also fit for motorcycle.) 5.Add One-key entering battery voltage waveform analysis. (One-key get to waveform Analysis, easy to use and see the result clearly.)