Digital Input · LAN support protocol: Roon, airplay, upnp, NAA, Spotify (Configuration web page can be configured to open and close the protocol, can be upgraded online with one click) LAN speed 100/1000Mbps · 10M clock(BNC): Input impedance 50 0hm, 0dBm-20dBm, CMOS square wave 0.2V-3.3V, Sine wave 0.5V-3.3V.