If you are looking for a professional optical audio to 3.5mm adapter, then your research is over here. That's because our product can meet your need. Adopted of , practical and durable for long time use, not easy to get deformed and bring you much convenience. Features -Color:Black -Material:PVC, optical fiber - Size: 3.00X1.20X1.20cm/1.18X0.47X0.47in Digital input level: 0.1~1Volts p- /R analog output (1kHz@0dB): 800mVRMS Headphone output power (1kHz@0dBRL=32): 30mW SNR@0dB(CCIR/ARM):90dB Distortion: 0.1% Frequency response: 20Hz~20KHz Maximum working current: 350mA Power adapter specifications: input - 50/60Hz; DC output: 5V/1A Working temperature: -10~+55 degree centigrade Working humidity range: 5~90%RH (non-condensing) - 3-way optical fiber digital audio input, free to to one optical fiber output, and decode to one-way at the same time. - Automatic and recognition of input digital audio format, output stereo analog audio. - One-key input source and power standby, convenient and fast operation. - Headphone port output, can directly .5mm plug headphones. - Small and compact size, light in weight, you can carry and use it wherever you go. Package list: 5 x optical audio to 3.5mm adapters