Vanco 280533 Digital-Analog Converter Apple TV USB, S/PDIF Coaxial and Toslink Optical Inputs Supports Up to 24 bit/192 KHz Built-In USB Audio Interface and Headphone Amplifier Requires No Additional Software or Drivers Works with All Audio Formats Supports up to 24 bit/192 KHz USB, S/PDIF coaxial and toslink optical inputs 5V DC, either USB or external USB power adapter Built-in USB audio interface and headphone amplifier Dimensions: 4.1" wide x 1.2" high x 4.4" deep