Material: alloy material with stable performance and long service life. AC impedance: 600:600 ohms. O Closely coupled with isolation transformer, primary winding and secondary winding, with enough passband, small inductance of winding and small leakage inductance, which can reduce the influence of hysteresis loss. Voltage ratio: audio transformer 1:1. These isolation transformers are all high efficiency O-type transformers with EMI, high voltage and stable performance. Stable performance: lead-free compliant electronic components. Stable operation, convenient use and long service life. It is applicable to radio communication, radio and television, automatic control, voltage amplification or power output components. Colour: As Shown Material: Alloy Package Contents: 40 x Audio Transformer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.