1. Decoding digital audio signals from DTS / AC-3 into analog 5.1 channel audio signals. 2. The analog stereo (R / L) signal processed through an audio chip, transformed into analog 5.1-channel audio. 3. Features dual SPDIF optical inputs, one coaxial input, and one stereo input for a more comprehensive multi-channel digital audio output, allowing for convenient switching. 4. RCA output interface for easy connection to amplifiers. 5. One-press multi-channel switch for quick and easy selection between stereo and 5.1-channel audio. Name: Digital to Analog Converter Feature: Optical audio cable Feature: Digital to analog audio converter Feature: Toslink cable Feature: Analog to digital converter Signal-to-noise ratio: 120db Resolution: 80db (1KHZ) Frequency response: 20Hz ~ 20KHz +/- 0.5db Analog output level: 2.2V Colour: Black Material: Metal Size: 11 x 7 x 2.5cm Package Contents: 1 x Host 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 to differ slightly from the actual product. Allowable measurement error is +/- 1-3cm.