Perfect to elevate an older receiver, add Bluetooth for streaming and an optical input so you can connect your TV as well. It’s a quality sounding component. Mike @ Audio Two Fiio All connections in one Input and output at the same time, with our new bypass mode One button for total control, for easier selections Dimensions: 120 x 55 x 25.8 mm High-definition Bluetooth for higher heights of joyThe BTA30 Pro utilizes Bluetooth 5.0 with support for the SBC/AAC/aptX/aptX LL/aptX HD/LDAC high-resolution codecs – and even supports transmitting and receiving LDAC. The aptX LL is also supported and prioritized for satisfying low-latency gaming. These high-definition Bluetooth formats cover a wider range and have faster transmission rates for a more exhilarating experience! Great movies should come with great soundCreate your own private theater with immersive high-definition sound anywhere, anytime! Connect the digital output the TV/CD player/computer to the BTA30 Pro, which can then transmit to your Bluetooth headphones (including the LDAC format with any input) for a truly cinematic listening experience. Good old wired audio still has its advantagesIf not using Bluetooth, there is also excellent audio output! When connected to a computer or other devices with the appropriate cable, the BTA30 Pro can be used as a DAC to convert digital audio to high-quality analog signal for a serious upgrade to your sound. Coaxial input supports up to 384kHz/24bit and native DoP128; optical input supports up to 96kHz/24 bit; USB input supports up to 384kHz/32bit and DoP256.