I bought this key because it has a detachable antenna, I can replace it with an antenna manufacturing "house" (16 elements Yagi 16dBd) Ultra-easy installation (only drivers) and faultless operation but the "high gain" is so only on paper. In reality we gain a little orienting the antenna but it is quite limited, 4dBi do not even 2dBd is little! The support is convenient and there is a large LED that glows green through the plastic front panel. Good price / quality ratio and standard N but I recommend especially for hackers who want to experiment with other antennas on that key. Small precision the antenna side connector is a "plug" RP-SMA male.
Coming to buy an Alfa AWUS036H I revise my review because Alfa is really the bomb. There or TP-Link networks located 7 Alfa finds 18! TP-Link is therefore a key like the other with 2 small "plus" the base and the exchangeable antenna.