This DAC& Bluetooth converter converts optical or coaxial digital audio signals and Bluetooth receivers into stereo analog signals. Help users connect high quality digital audio signals to regular AV amplifiers. This product is very suitable for home theater, teaching, training structure, conference rooms, home appliance stores and other places. Features:Support digital audio signal conversion to analog audio;Bluetooth receiver, built-in Bluetooth 5.0 version chip;External Bluetooth antenna;Support automatic switching of Bluetooth mode;Personalized indicator;Support one fiber and one coaxial interface input;Built-in high-performance DAC chip supports 192Khz/24-bit audio parameters;Support 2RCA and a 3.5mm audio port output;Support output volume control;Ultra low power consumption Colour: black Material: plastic + metal Size: 8.5 x 9.2 x 2.2CM Package Contents: 1 x DAC Bluetooth converter 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.