Review on 📶 Oumij WiFi Router Double Helix Antenna - 12DBi High Gain, 2.4/5GHZ Dual-Band Support for Most Routers and WiFi Devices (3 Meters) by Matt Tbone

So I tried two ways. I tried connecting a few of these to my real router. (with different combinations) I also tried connecting this directly to my WIFI network card. (My results are broadly applicable to both applications). So the physical size of the connection worked fine, the connection was good and tight. the power bandwidth of the connection dropped that at 12dBi I was a little shocked that it performed worse than the standard small antennas I had to work with. My results never stopped shocking me. After I managed to connect to these, (both direct connections are 2.4 and 5GHz). I started doing online speed tests. My speed dropped 2/3 more on almost every exit (compared to the stock antenna). Worst result? I've actually gotten better test speeds when the antenna isn't connected to my NIC than when it's installed. (Admittedly I was testing pretty close to the router at this point, but it still shouldn't be) Came back with no problems and got another one. No questions.