The UniFi Antenna, model UMA-D, is an optional mesh antenna designed to work with the UniFi® AC Mesh AP and model UAP-AC-M. With dual-band support, the UMA-D expands range coverage and provides customised pattern shaping. - Outdoor Weather-Resistant Enclosure - High Efficiency Directional Radiation Pattern - Dual-Band, Dual-Polarity Optimized for 802.11ac - Ball Joint 3-Axis Mount for Precise... Aiming - Wall/Poll Mount Included for Versatile Installation