The digital-to-analog Converter and Bluetooth converters convert optical or Coaxial Digital Audio Signals and Bluetooth receivers into Stereo analog signals. Audio power amplifier helps users connect high quality digital audio signals to regular audio channels. This product is suitable for Home Theater, teaching, training structure, conference room, home appliance store and other places to use. Support for conversion of digital audio signals to analog audio Bluetooth Receiver, built-in Bluetooth 5.0 chip Supports one fiber and one coaxial interface input Support for RL audio port output Built-in high-performance chip supports 192khz/24-bit audio parameters Ultra low power consumption DC 5V Dimensions:50X42X22mm Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Colour:black Material:ABS Voltage: DC5V Package Contents: 1 x Digital to Analog Audio Converter Adapter 1 x Power adapter 1 x Fiber Optical Cable 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.