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|Durability||Meets Military Specs|
|Digital Standard||900 MHz FHSS|
|Frequencies||900 MHz FHSS|
The radios are used in an auto sales company and have proved themselves many times over.
Management of large estate with mixed terrain.
The best licence-free radio on the market and the best clarity I have ever heard. It is expensive, but built to military standards and has the longest range of any UHF radio. It even beats VHF radios outdoors; places where VHF is supposedly better. Programming is complicated but the software is free. One needs a Motorola programming cable, plus a serial-to-USB adapter to program them from the computer. One can program many of the functions (except changing the names from generic ID numbers to proper names for the various individual radios and groups) right from the keyboard, but it can be confusing. Thankfully, there are many enthusiasts of these radios on internet forums who can help. One can also just turn them on and use the factory defaults. In five years of owning DTR550, DTR650 and DTR410 radios, I have never heard another transmission even on the factory default channel 1, Group ID 1. The latest version of the DTR550 as sold here now comes with the latest firmware, a one-hour charger and the longer 1/2 wave antenna. Keep in mind the only radio that can communicate with a Motorola frequency-hopping spread-spectrum radio like the DTR550 is another DTR radio (and now, the newly-introduced DLR series too.) They do not transmit on business or recreational bands, but if you are looking for good clarity, no interference, no need for licening and the ability to call up individual radios while still allowing other users on the same band of frequencies, these are definitely worth a look.
Radio works extremely well. Very clear reception and transmission. Would highly recommend.
First off these radios are the best two way radios that I have ever had the chance to test. Me and a friend tested these radios in a residential area with uneven terrain and were able to achieve at minimum 1.83 miles with our max distance being 2.33 miles. Compared to our analog radios which are Vertex Standard VX-231 UHF 5 Watt handhelds we were able to achieve an 83% increase in distance using only 20% of the power of the analog radios. This is quite impressive and on top of that the voice quality is very crisp and when you go out of range there's no cutting out and annoying static. In fact the radios have a way of telling the user that they are either in range of each other or not in range of each other which takes the guess work out of trying to measure coverage. Oh and also when making the above coverage measurements in town my friend was standing outside at his place while I was talking to him from INSIDE a car driving around. Programming the radios was a breeze using the FREE programming software (take note Vertex Standard) with an easy to understand interface. When you purchase the programming cable which is what I did when I bought the radios, make sure to have a DB-9 to USB adapter handy to convert the DB-9 serial connection to USB for your computer. Overall you are getting an exceptional value for the price which yes is a little high, but these radios will make up for the price tag in performance and build quality.
My company uses 5 of these radios in a 388 thousand sq ft distribution center. It is a quarter mile from one end of the bldg to the other, filled with cardboard boxes of electronic equipment. The reception is so good that it sounds like you are standing beside the other person when you are a quarter mile apart. We are very satisfied with this radio.
Decent range, about 5-6 blocks easily in the neighborhood, and not line of sight either. Open areas have even better range. Longer antennae can squeak out even more distance. Freq. hopping all but guarantees no interference. Clear sound and headsets and other gear is easy to get. Programmed generically out of the box but if you want to do anything customized you need the programming cable and since it's a 9-pin serial port (that most computers don't have anymore) you need a USB adapter too. Small size and lightweight, quite sturdy as well. Four stars for lacking full programming without a computer and I'd prefer an AA adapter but that's personal preference.