I-GDDO-20C AC/DC Idivayisi Yokulinganisa Imitha kagesi isetshenziselwa ukuthola iphutha eliyisisekelo lamathuluzi ahlukahlukene kagesi wefrikhwensi ezinhlelweni zamandla, okuhlanganisa i-voltmeter, i-ammeter, i-wattmeter, i-ohmmeter, isigaba esisodwa namamitha wamandla wesigaba sesithathu se-AC (ongakukhetha) kanye nephutha eliyisisekelo DC volt-meter kanye ammeter.