ITEM NAME:5PCS Audio Transformers 600:600 Ohm Europe 1:1 EI14 Isolation Transformer ME.Model: EI14. AC impedance : EI14 600 : 600 Ohm. inductance : 290mH ( ±20%). Alternating-current impedance value : 600. DC resistance : 135( ±%). secondary coils : 800 turns.