The Rocket is a rugged, high-power, very linear 2x2 MIMO radio with enhanced receiver performance. The device has extra memory and CPU capacity to handle demanding Basestation (AP or PtMP) applications.
Clause 45 allows:
For example - metal is a 100% reflector at this frequency so it will not pass through metal. And 900MHz works best when one or both antennas are well above the ground.