UVP-TouchMax Operating humidity 10 to 90% noncondensing Certi cations FCC, IC, CE Software LED Power status: white glowing Audio DSP algorithm Active echo cancellation, noise suppression, blind source separation Protocol SIP/SDP/RTP/RTCP/VLAN/DHCP Number of supported phone lines Multiple UniFi OS application UniFi Talk Minimum software requirements Web browser (Chrome™ recommended) Ubiquiti products are s old with a limited warranty des c ribed at: ui.