TP-Link CPE210/220 is a 2.4Ghz outdoor access point similar to Ubiquiti NanoStations. There is also a 5GHz Version of this AP, the TP-Link CPE510/520. The device has a built-in 9dBi 2×2 dual-polarized directional MIMO antenna with a beamwidth of 65° (H-Plane) and 35° (E-Plane).
Remove the cap at the lower back of the device. Undearneath the sticker which labels “GND”, “LAN0”, “LAN1” and “RESET” in the lower left and lower right corner, there are two screws to remove. Afterwards, you can slide the whole board out of the case by applying some force.