Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: On the bridge side, will this work with a 2.4 GH access point? or is a 5 G needed?
Document: So if you're trying to achieve my same setup, you'll need two of these, one on each end. Or something with 5ghz as the other end of this access point/client bridge combo.Also, as standard with all Engenius stuff, the admin interface is easy to use, but once you hit accept to make changes on a particular setting, you then need to go to the top of the nav menu (left side) and click on the Main button where you can APPLY those changes.
Very easy to configure. i got 4 buildings connected with enh500 and ens500ext. 5 min setup and worked in seconds.
Needed a temporary wireless bridge solution for client who is moving store location. Old store and new store are within 200 yards and client needed a way to inventory (bar code scan) items at new store into quickbooks point of sale at old store (server is at old store and desktop client at new store). Because this is quickbooks and using a hand held scanner, VPN, LogMeIn, etc was not a solution.
My Setup was to broadcast wifi from my main business building to a second building 400 feet away. I was going to use one as an access point and one as a client bridge.First I'd like to mention that I had the ENH200EXT and after 1 month had problems with the device not working with an external antenna. Since that model didn't have an internal antenna, it was rendered useless.I then chose (reluctantly) to purchase another engenius product, so I chose this ENH500.
Ask me how I know.Regarding Range... I have my buildings about 400 - 600 feet apart, and I still get full signal strength. Just for a test, I drove about half a mile away and still received signal, though the strength was dying off. I really think someone who needed to bridge a large gap could pull it off with this item, just keep in mind the antenna is directional so try to stay within 30 degrees of the antenna both horizontally and vertically for best results.
So I set things up temporarily so they'd still have internet access by putting the bridge on a camera tripod and pointing it out a window.A few days later my friends had blinds installed. Because my tripod setup was in the way, she pulled it out of the window and put it on the floor of the closet. I would estimate that it's currently pointed 30 degrees off of a direct line to mine, as well as being maybe 15 degrees down.
Great device to behave as AP when paired with ENH700EXT as a client bridge (and operating as a 2.4GHz AP). Very easy to setup and manage.Could provide a little more information in the management page about network speed, and having to use a proprietary PoE injector kind of stinks, but overall great tool for extending a wireless network and bridging two buildings together.
We use the primarily for our building-to-building connections and have had good success with them. They have the occasional reset back to factory defaults but then you restore it back to its configuration and everything continues to work well. Backups save lives.
I needed something I could use to have internet in the garage ( I have a business that I set up in the garage that requires internet service) I previously had a antenna and repeater but the signal was so weak that I had to open the garage door to receive or send.not any more!
And somehow it continues to work. I'm not sure if it's because they're good for 3 miles, and at 600 ft. there's enough power to shoot through the wall. Whatever the case, I did speed tests before and after it was moved, and it really hasn't changed.I've only had things set up for a week, but it seems to be working flawlessly. Great product.
Answer: you will need the same Frequencies on both sides of the bridge.  EnGenius has both 2.4 or 5