Top critical review
2 units tested - only the left connector works on both (2nd unit purchased 2 months after first)
Reviewed in the United States on July 4, 2017
Something is legitimately wrong with this product. After many network monitoring tests, I have concluded that only one of these antenna adapters actually works. Both antennas are fine, but only one plug is active. This might not be that big of a deal if it wasn't for the fact that the single antenna port that works, has a horrible signal. It's about 3x worse than my laptops built in wifi card. Less than ten ft away from my router, yields a signal strength of 90db + (no matter what orientation of the 1 working antenna port). Switching over to my built in wifi card, shows a signal strength of 25db in same location. For reference, I did update the drivers on Windows 10. I've also tried this adapter on two Windows 10 computers with the exact same results. Maybe I got a lemon or something, but for this kind of product to pass quality control, should make anyone think twice about purchasing. My 10 year old (54mbps) adapter (no external antenna's) easily gets better signal strength and more networks. Returning promptly, it's a really horrible product..
Edit: I've run a few more tests. I'm within 3 feet of my router right now, and the signal strength is, at best, 74 db. I think this device is causing destructive interference wifi patterns on itself. It's the only thing that makes any sense. I'd love to open it up and see if I can fix it with a quick solder, but I want my 25 bucks back.
EDIT: Bought a second one 2 months after initial review and can say with 100% certainty that the right antenna connection on both units only SLIGHTLY enhances 5GHz signal (comparing to using w/ no antenna). The left antenna, increases both 2.4 and 5GHz bands, while the right antenna connector shows absolutely no 2.4GHz bands whatsoever (aside from being 3 feet away from a 2.4GHz router.. This must be a mass manufactured defect in either all, a particular batch, or (even worse) by design. It's hard to believe that 2 units purchased months apart would have been from the same batch... I suggest that if you do own this product, to test connection signal strength with only one antenna connected to the right side port and report in your reviews/comment here if you observe the same results. I'll attach images to show the data on signal strength with all combinations of possible antenna configurations (i.e. no antenna - left only - right only - both).
I've tested the individual antenna that came with this, separately on a a Panda wifi adapter. Surprisingly, they are very good antennas when used with another adapter. The main body is messed up in these and can't utilize the antennas power. I took apart on of the antenna and can verify that the actual antenna (internals) are build correctly and with good quality.
My suggestion from this though, is to just go with the Panda Wireless PAU09 N600 Dual Band. The Panda unit works really well. Plus it works with Kali Linux.
I took an hour combining tests for this review because I have come to hate this product and the company who makes them (I gave them a chance, but decided to keep the defective unit(s) and throw them a hard up middle-finger).. After contacting support to inform them of a dead-on-arrival product(purchase #1), they requested that I pay to ship it back to them, and then wait 2-4 weeks for a replacement to be sent from China. WTF is up with that??? Their idea of this situation is that a customer is supposed to pay for a problem the company should bear 100% responsibility for. Anyways screw this company and this product. Let the data speak for itself. Here's the product you should buy though: