High-quality 4-input, 2-output audio interface with volume control. - Model Name: Babyface Pro - Input Channels: 4 - Output Channels: 2 - Connection Type: Optical - Features: Volume Control - Included: Cables Thank you for viewing. Please check the condition with the many photos provided. This is a fully functional product that works without any issues. The USB B to A cable, manual, and original box are missing, so the product condition has been downgraded by one rank. However, it's a reasonable price for those who don't mind the missing accessories!