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 Theater, teaching, training structure, conference room, home appliance and other to use. Support for conversion of digital audio signals to analog audio Bluetooth Receiver, built-in Bluetooth 5.0 chip; Supports one fiber 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; DC 5V Dimensions:50 x 42 x 22mm Optical fiber cable length: 1 meter USB power cable length: 90cm PCM Sampling Frequencies: 96 kHz PCM Word Length: 32-bit Inputs: Optical (SPDIF),Coaxial Outputs: RCA Type: Portable Model Number: Digital to Analog Product Name: Digital to Analog Audio Converter D/A Converter: Digital to Analog Audio Converter Support Bluetooth Model Number: bluetooth DAC Feature 1: Bluetooth 5.0 Audio Decoder DAC Amplifier Feature 2: Digital to Analog Audio Converter DAC color:Black Material:ABS Package Contents: 1 x DAC Bluetooth decoder 1 x USB power cable 1 x Fiber optic 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.