Features: 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 ABS Housing DC5V Specifications: Color:As picture Quantity:1PC Size:50*42*22mm Package Include: 1*Converter 1* Power supply 1*Optical Cable Note: 1.Please allow 0.1-0.3cm differences due to manual measurement, thanks. 2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.