[analog to digital audio converter]Converts RCA or 3.5mm AUX analog stereo audio signal to Digital Coaxial audio and Toslink Spdif Optical digital audio simultaneously. Note: Its not a Digital to Analog audio converter [TV aux to optical for sound bar]Supports uncompressed 2-channel PCM digital audio signal output,Supports output sampling rate at 32K,44.1K,48K audio sampling rateDoes not support Bluetooth speakers [Automatic encoding design ]No software installation, automatic recognition of audio formats, high bandwidth design, no need to have concerns about distortion and loss of some audio content [Small compact design] Soft light LED indicator to avoid harsh bright light.Designed with aluminum metal housing to guarantee heat dissipation and electromagnetic compatibilityextending product life