Wireless Uplink functionality enables wireless connectivity between APs for extended range. One wired UniFi AP uplink supports up to four wireless downlinks on a single operating band, allowing wireless adoption of devices in their default state and real-time changes to network topology. For devices that support Plug & Play Mesh, this functionality is extended to allow multi-hop wireless uplink ? so wirelessly uplinked APs can support uplink to other wirelessly uplinked APs. Indoors/Outdoors The UniFi AC Mesh AP includes adjustable dual-band omni antennas, and you have the option to use any 5 GHz omni antenna for spot-beam coverage in high?density locations with numerous APs and clients, like a conference hall. https://www.ubnt.com/unifi/unifi-ap-ac-lite/ UniFi (Enterprise WiFi)