Features: Digital optical audio adapter - 3-channel fiber (SPDIF/for TosLink) digital audio input, freely switch to one fiber output, and decode it into one way. L/R analog audio output and one headphone output. 24-bit audio DSP and 96KHZ/24bit DAC digital processing chip. Support for digital audio formats such as Dolby AC3, DTS, THX, HDCD, PCM, etc. Automatic detection and recognition of input digital audio signal format, output stereo analog audio. Easy and fast operation - One-button switching input source and power standby. Headphone port output, can directly drive 3.5mm plug universal headphones. High quality sound with low noise. Power-off memory function - Switch-free signal source after restarting. Safe to use - DC overvoltage and power-off protection function to prevent damage to the product when the wrong power supply is used Powered by a DC5V/1A external power adapter. Specification: Type: Digital Optical Audio Adapter The adapter is compatible with mini for Toslink fiber ports (For Apple, DVD, CD, Mini, for DAT, Gaming, or Digital Audio.) Suitable model:For Apple PowerBook G4 / Apple iMac G5 / Apple Mac Mini / Apple iMac Intel / Apple MacBook / MacBook Pro / Apple Aiport Airport Express 8.02 model Product specifications: ADCN0001M1 Support audio format: DTS/DTS-CD/AC3/HDCD/THX/PCM/LPCM Digital input level: 0.1 - 1Volts p-p L/R analog output (1kHz@0dB): 800mVRMS Headphone output power (1kHz@0dBRL=32): 30mW Signal to noise ratio @0dB(CCIR/ARM): 90dB Distortion: 0.1% Frequency response: 20Hz - 20KHz Maximum operating current: 350mA Power adapter specifications: AC input 100V-240V 50/60Hz; DC output: 5V/1A Working temperature: -10 - 55℃ Operating humidity range: 5 - 90% RH (no condensation) Weight: Approx. 27g Package list: 5 * Digital Optical Audio Adapters Front Panel Schematic: IN1-3: SPDIF/ For Toslink fiber input terminal Green LED: Input source port indicator. All indicators are off when the power is off. PWR (Red LED): power indicator SWITCH: Short-pressing the power-on state is the input signal source selection, long-pressing for more than 3 seconds is the power-off; Short-press the power-off state. Rear Panel Schematic: DC/5V IN: 5V DC power input L-OUT-R: Analog left and right channel audio output: 3.5 stereo headphone output OUT: SPDIF/for Toslink fiber output terminal Connection and Operation: 1. Connect the SPDIF/for Toslink output port of the HD signal source to any SPDIF/ for Toslink input port of the audio decoder through the fiber optic cable. 2. When digital audio is required, connect to the amplifier through the fiber optic cable from the SPDIF/for Toslink output port of the audio decoder. 3. When analog audio is required, connect to the amplifier or TV through the audio cable from the L/R output port of the audio decoder. 4. When using headphones, you can insert the headphones (3.5mm connector) into the HP output of the audio decoder. 5. Finally, connect the 5V power adapter to the power input of the switch, and then plug the adapter into the power socket. 6. Use the toggle button on the decoder to select the corresponding input source. 1、Digital optical audio adapter - 3-channel fiber (SPDIF/TosLink) digital audio input, freely switch to one fiber output, and decode it into one way. 2、Automatic detection and recognition of input digital audio signal format, output stereo analog audio. 3、Safe to use - DC overvoltage and power-off protection function to prevent damage to the product when the wrong power supply is used 4、Headphone port output, can directly drive 3.5mm plug universal headphones. 5、Power-off memory function - Switch-free signal source after restarting.