The Ubiquiti airMAX® ac Sector Antenna (AIR-S521AC) is a premium $5\text{ GHz}$ base station antenna engineered to deliver high-capacity multipoint coverage. Featuring a $21\text{ dBi}$ gain and a localized $60^\circ$ beamwidth, this sector antenna is specifically designed to seamlessly pair with Ubiquiti Rocket® ac radios.Built for demanding tower environments, it features advanced RF isolation characteristics that drastically reduce sidelobes and backlobes. This enhanced noise rejection improves beam performance and allows for cleaner channel allocations in dense, co-location deployments.Please Note: The Rocket wireless radio is sold separately and is not included with this antenna.