... a kind of all-purpose tester for testing volt-ampere characteristics, ratio, polarity, demagnetization, checks for primary current, ACTV and so on. ... CT/PT, ratio, polarity, error curve of 5% ,10%, primary current, ACTV and demagnetization.Large screen with Chinese and English ... / warranty cardA piece of power wireTwo pieces of testing wire for primary side (one red, one black, testing pincers )A bag ...