The UniFi Antenna, model UMA-D, is an optional mesh antenna designed to work with the UniFi AC Mesh AP, model UAP-AC-M. With dual-band support, the UMA-D expands range coverage and provides customized pattern shaping.

The most important features:
Dual-Band, Dual-Polarity Optimized for 802.11ac
High Efficiency Directional Radiation Pattern
Three-Axis Ball Joint Mount for Precise Aiming