NooElecNESDR Mini 2+ 0.5PPM TCXO RTL-SDR & ADS-B USB Receiver Set w/Antenna, Mount & Female SMA Adapter. RTL2832U & R820T2 Tuner. Low-Cost Software Defined Radio for Windows, Mac OS & Linux

I like it! I use SDR* (this unit in particular with the "HAM IT UP" converter) to spot signals/callers on whatever ham band I'm working at the time - a bit "wimpy" (sensitivity seems to drop off a bit on my module) at the AM radio frequencies and lower - If you want it for VHF and UHF listening it seems perfectly fine (police, fire, weather) I've had some compatibility issues with certain older USB ports - I also have had a bit of trouble getting it to work well with SDR # (again on some older machines and one newer machine) which surprised me a little - BUT since I basically use HDSDR and it worked very well with that, I didn't fight very hard to resolve the SDR # issues on some machines - it is definitely compatible with either SDR program and many others - it works VERY well on both programs on my Lenovo YOGA PRO 2 - it's an eye opening experience for such an inexpensive module to get an insight in to SDR, esp. if you've never beenexposed to SDR before*SDR means software defined radio(on edit 2/14/2016)This unit has totally converted me to SDR - I will be buying some kind of SDR FLEX transceiver system as a result of this unit, but I digress - HF. VHF, UHF, different modes, and then there's aircraft tracking as well - there just doesn't seem to be an end to the things I keep discovering it can do.If you're at all interested in radio modes, sw listening, and can't or don't want to invest a lot of money, this is definitely the way to "get your proverbial feet wet"You definitely want an upconverter though if interested in SW listening or HAM RADIO. (I'm using NooElec's V1.3 unit) This has also become a very important "band preview" device as well. It holds up well in strong transmitter fields. I expected I like it! I use SDR* (this unit in particular with the "HAM IT UP" converter) to spot signals/callers on whatever ham band I'm working at the time - a bit "wimpy" (sensitivity seems to drop off a bit on my module) at the AM radio frequencies and lower - If you want it for VHF and UHF listening it seems perfectly fine (police, fire, weather) I've had some compatibility issues with certain older USB ports - I also have had a bit of trouble getting it to work well with SDR # (again on some older machines and one newer machine) which surprised me a little - BUT since I basically use HDSDR and it worked very well with that, I didn't fight very hard to resolve the SDR # issues on some machines - it is definitely compatible with either SDR program and many others - it works VERY well on both programs on my Lenovo YOGA PRO 2 - it's an eye opening experience for such an inexpensive module to get an insight in to SDR, esp. if you've never beenexposed to SDR before*SDR means software defined radio(on edit 2/14/2016)This unit has totally converted me to SDR - I will be buying some kind of SDR FLEX transceiver system as a result of this unit, but I digress - HF. VHF, UHF, different modes, and then there's aircraft tracking as well - there just doesn't seem to be an end to the things I keep discovering it can do.If you're at all interested in radio modes, sw listening, and can't or don't want to invest a lot of money, this is definitely the way to "get your proverbial feet wet"You definitely want an upconverter though if interested in SW listening or HAM RADIO. This has also become a very important "band preview" device as well. It holds up well in strong transmitter fields. I expected damage at high transmitter power, but so far nothing. It just keeps on ticking! :)I had problems with a WIN 7 install originally. Something was wrong in that original OS. Same machine but upgraded to WIN 10 Pro, and both SDR# and HDSDR work perfectly now. I expected possible damage at high transmitter power, but so far nothing. It just keeps on ticking! :)I had problems with a WIN 7 install originally. Something was wrong in that original OS. Same machine but upgraded to WIN 10 Pro, and both SDR# and HDSDR work perfectly now.What, $20.00 or $25.00 plus the upconverter @approx: $45.00 and you have quite a bit you can do. I really like it for ham radio but recently using the aircraft tracking sw. has really been "enlightening!"

I purchased two of these NooElec SDR dongles with the intention of monitoring ADS-B broadcasts of over head air traffic and local trunked radio systems. The dongles themselves are well made and work perfectly. The supplies antennas also work surprisingly well across a broad range of frequencies. I was able to pick up ADS-B transmissions from my basement that were over 150 miles away. While this hardware does work well, be warned that the common 3rd party software for this equipment can be very difficult to setup and use. This product also requires an advanced level of understand of both computers and radio equipment/frequencies to use effectively. I was able to finally receive the ADS-B transmissions with significant effort after a couple evenings working on it (using RTL1090 and ADS-B Scope software), but I was never able to get the trunked radio software (Unitrunker) to work.

I've tried a few of the "cheaper" models out there, they are decent, but drift 30-45PPM error - when this came down in price, I was eager to get one. I've used it on Windows and Linux (both Debian x86 and RaspberryPi ARM) it seems to run well, though I had to manually update the drivers in Windows 10 to make it work (Windows Update reverted them back, I just had to say "pick manually" and click the right one again).NooElec's SDR not only bet but far exceeded my expectations! Mine came with a small telescoping antenna - while not the best, it at least works better than the tiny stub that others include to get started! On top of that, the stability is rock solid with the temperature compensation. I'm left wishing I had put the money toward a another of these instead of the other basic units.One thing worth noting, the error on my unit was 0.6-0.7 PPM error according to "Kalibrate-SDR", slightly above stated spec. More testing is needed to determine if this is "warm up" or fixed, but it seems worth mentioning. I'll take off 1 star (wish I could give it 4.5 star) for that being outside their stated specs, but that is still top-notch.