1. Decodes DTS/AC-3 digital audio signals into analog 5.1 channel audio signals 2. Converts analog stereo (R/L) signal via audio processing chip to analog 5.1-channel audio output 3. Features 2-way SPDIF optical input, 1 coaxial input, and 1 stereo input for comprehensive multi-channel digital audio support with convenient switching 4. RCA output interface for easy connection to external amplifiers 5. One-touch switch for multi-channel, stereo, and 5.1-channel audio mode selection Basic function: DTS/AC3 5.1 channel audio decoder Design concept: The DTS/AC3 Audio Decoder is designed to decode audio output from various audio-video sources such as PCs, laptops, gaming consoles (PS3, XBOX360), HD players, HD set-top boxes, Blu-ray DVD players, and other devices supporting DTS/AC3 formats. It enables immersive audio experiences suitable for home theaters, educational institutions, public spaces, concerts, and cinemas. Signal-to-noise ratio: 120dB Resolution: 80dB (1kHz) Frequency response: 20Hz - 20kHz +/- 0.5dB Analog output level: 2.2V Note: Product appearance, color, and labeling may vary slightly between batches, but these differences do not affect functionality. Plug Type: EU Plug (compatible with countries including Germany, France, Italy, Indonesia, and others) Voltage: AC 100-240V Color: Black Material: Metal Size: 105 x 75 x 25mm Package Contents: 1 x Decoder 1 x Power Adapter Note: The package includes only the items listed above. Other accessories or products are not included. Lighting and display settings may cause slight variations in the color of the product as seen on screen compared to the actual item. Measurement tolerance: +/- 1-3cm.