Audio transformer Specifications: MODEL:EI-14 Voltage ratio: 1:1 Inductance : 290mH (20%) DC resistance : 135 Ohm(1%) AC impedance : 600 : 600 Ohm Moisture-proof mode: open Cooling mode: oil immersed air cooled Frequency characteristics: intermediate frequency Appearance structure: vertical QTY: 50 PCS Lead-Free / RoHS Compliant Electronics Component. This product is widely used in product development, student experiments, maintenance, production, etc.