This Control4 Wireless Music Bridge Model C4-WMB-B is a versatile device that allows you to stream audio wirelessly via Bluetooth, AirPlay, or DLNA. It has stereo audio L/R RCA and digital audio coaxial RCA outputs for high-quality audio transmission. The unit is compatible with various brands and is a great addition to any smart home setup. It comes from China and has an unknown Smart Home Compatibility and California Prop 65 Warning. This unit is sold as a single item.