Kanex K172-1049-BK7I Digital Adapter Compatible with Apple TV (4th gen), Amazon FireTV, or Roku-Power Adapter Included Plug and play your new Apple TV (4th Gen), Nexus Player, Amazon FireTV, or Roku to your existing home theater sound system or sound bar Connect directly via standard digital optical or 3.5mm audio port. Supports 7.1, 5.1 surround sound via standard SPID/F Optical Audio, or 2.0 surround sound The HDMI AV Digital Adapter allows an HDMI TV, Monitor, Projector, or Display to utilize Apple AirPlay mirroring from an iPad to new Apple TV, so you can take advantage of the latest technology Micro-USB port for connecting to included power adapter (Kanex 1 Amp wall charger and 4 foot/1.2 Meters Micro USB cable) 8.25inch / 21cm adapter length Resolutions Supported up to 1080p Video Resolution: Up to 8-bit 4K (30Hz), 12-bit 1080p (60Hz),or 12-bit 720p/1080i (60Hz When connecting the adapter with a 5.1 Channel Surround Sound Receiver, you may experience loss of audio from other input sources. To resolve this issue, it is recommended to connect the 3.5mm audio cable into the 3.5mm audio port to eliminate this issue