4K/UHD HDMI Multi-Channel Digital
to Two-Channel Balanced Analog
Audio Converter
atlona.com
Toll free: 1-877-536-3976
Local: 1-408-962-0515
Please check http://www.atlona.com/UHD-M2C-BAL.html
for the most recent firmware update or manual.
User Manual
AT-UHD-M2C-BAL