This product is a 30 degree 'sector' UniFi AP.
Here is what you get:
UniFi networks are ideal for WiFi networks where there is a number of APs that share the same configuration, or need to use WPA-Enterprise (RADIUS) authentication. Such networks are common in:
For the same reason (protocol overhead), the maximum user data throughput over a 100 Mbps ethernet port is always less than 100 Mbps.