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reading the reviews makes them look to good to be true which of course means I have to come to the dope for the dope.
the mics are hands down the cheapest and best looking (for the price range) out there. but I dont know if the site is even remotly legit.
They are only VHF, which isn’t as good as UHF. This could partly explain the cheaper cost.
To a degree you get what you pay for with microphones. I suggest sticking with brands like Shure and EV. Shure in particular has a deserved reputation for making mikes with good sound quality and amazing durability. When I perform, I use a Shure SM58 and an SM57, both of which I’ve had for over twenty years. My experience with cheaper microphones has been that they break easily.
I should mention that the amazingly durable mikes mentioned above are wired mikes. My hure SM58 wireless which she has had for about two years. It’s a good mike. I use a Shure wireless guitar hookup. I like Shure. 
Sheesh. Maybe I should quit typing. That should say “My lead singer has a Shure SM58 wireless…”. :smack:
I agree with this statement 1000% except the words “To a degree”. I don’t knnow anything about this mike especially, but I strongly recommend against buying any mike you haven’t been able to try out yourself firsthand, unless you’re willing to lose your money. Mikes are one of those things that are too easy to screw up.
What would you be using it for, anyway?
Just a quick note — this isn’t always true. Generally, yes - that’s a good rule - UHF = better than VHF. But in some locations, a VHF mic will encounter less interference than a UHF mic. Which is why there’s real value — if you can swing it — in testing your microphones where you are going to be using them.
I should have posted a bit more info I suppose, I wont be singing, I plan to use it in the classroom (well my students will anyway) so its just for talking. it will be hooked up to a stereo. I dont need anything ultra fancy but because its a classroom a wired mic isnt a good option. its also nothing I really need atm but will probably need a few months down the road.
If you’re talking about non-hifi quality, I would like to suggest something that I have had good success with, a Sennheiser EW100ENG-G2 UHF system. This is a “combo” kit with 1 receiver and 2 transmitters: a bodypack and a plug-on one that works with any XLR mike. It sells for about $600.
My needs are audio to accompany video, and although quality is important, I don’t expect studio or hifi quality so I haven’t done any comparisons with other units.
You might not need the whole package if all you need is a lav mike, transmitter & receiver. I believe the component parts are available separately.
The only complaint I have about it is it seems to use a lot of AA batteries. (Specs claim 8 hours min.) If I were using it on a daily basis, I would probably use rechargeables and rotate a set or two.
The range is good, more than 1000’ ft in open air. I have used it between rooms and floors without any problems. As to interference, my applications are in areas where RF signals are rare and I haven’t detected anything wrong. (The specs say 1440 channels available.) The Sennheiser system has many channels to choose from and some nice features (adjustable RF levels, AF levels, squelch options, open frequency search, pilot tones, more).
How big is your classroom? Are there a lot of flourescent lights? (These cause electronic noise that your mike might pick up.) Are there a lot of other electrical devices in the room or in the next room that might couse interference? Do you care if your voice sounds ‘tinny’?
I’ve used the Sennheisers Musicat mentions and they’re great. They’re also probably a bit more expensive than you are prepared to pay, but in the long run you will probably be happier with the better product. While I know nothing about the mikes you linked to, my suspicion is that the range will be low, they will pick up a lot of interference, eat a lot of batteries, and die within a year. I may be wrong, but that’s generally what you get when you go cheap. It may be worth it as a ‘proof of concept’ type investment, before buying something decent. Your call.
Probably the best thing you can do is hit some messageboards that teachers hang out on and see if anyone else has tried this. Find out what they use. The advice you get on this board is most likely to come from musicians and AV professionals, and we’re not going to point you at the cheap stuff 
Nor should we. Cheap wireless systems are crap, and often worse than useless. While a super expensive system isn’t called for, a quality brand should be obtained. Aside from those already mentioned, AKG, Telex, TOA, Samson, or even Mipro would all be vastly superior to the linked product - “Simply Plug the Receiver into any standard 1/4 inch Mike input in your PA system, mixing board, Karaoke system, tape deck or stereo system.” There’s no such thing as a “standard 1/4 inch mic input”. Standard mic inputs are XLR. If this thing has an unbalanced mic level output (can’t tell if it’s mic level or line level because they don’t provide any proper specifications), it’s not going to work well at all to plug it straight into a stereo; it’d have to go through a mic preamp first. And for $50 giving you both a handheld and a lapel mic, I can guess what sort of frequency response the mics are going to give you - utter crap. Even a bottom of the line system from one of the major manufacturers will get you switchable mic/line outputs (which will let you plug the receiver straight into a stereo with a 1/4" to RCA cord) and a half decent mic.