MR86 supports Four external N-type female antenna connectors 2x N-Type antenna ports are located at the top of the MR86 and 2x are located at the bottom of the MR86. MR86 features dual band antenna ports thus dual band antennas should be paired with the AP. https://documentation.meraki.com/MR/Other_Topics/Frequently_Asked_Questions_regarding_Cisco_Meraki_Antennas MA-ANT-21 is not certified for MR86 as a Regulatory, it is Certified for use with the MR74, MR84 https://meraki.cisco.com/lib/pdf/meraki_datasheet_antenna_5GHz_sector_13dBi.pdf
... View more