Features: This product is designed for professional audio signals and can easily convert coaxial or Toslink interfaces to RCA analog audio interfaces and 3.5mm headphone jacks. The professional audio amplifier chip and volume adjustment knob are designed to directly drive the headphones and adjust the output volume. The product also has a bass adjustment knob that can easily control the bass component to meet different customer needs. An optical fiber and a coaxial input interface for DVD, HD players and other devices; A RCA output interface, connected to the amplifier system; 3.5mm audio output interface, connected to headphones. Specifications: Item: Digital to Analog Audio Converter Supports 192kHz 24bit sampling rate. Supports volume adjustment Supports bass adjustment Material: Metal housing, interference-free Supported system: all Resolution: 192KHZ Size: about 76mm x70mm x16mm/2.99x2.70x0.63in Note: Due to lighting effects and shooting angles, there will be some tolerances in the product, please understand. Please allow 0-1cm error due to manual measurement. Package includes: 1 pc Audio Converter