Scosche FMT5 TuneTone Universal FM Stereo Transmitter for Mobile Devices, Black Small

Pros:• Cheaper than every other FM transmitter I've seen so far (I paid $8, while most of the others on Amazon are about $15), despite being by a major name brand• Audio is true stereo• Supports a decent range of transmission frequencies (a total of 20 frequencies, 10 on the lower range of 88.1 to 90.9 and 10 on the higher range of 106.1 to 107.9)• Great battery life (estimate of at least 14 hours) from well-used 6 year old EBL (cheap Chinese brand) rechargeable NiMH 1100 mAh batteries• Won't drain your car battery, as is evidently the case with many FM transmitters that plug into the 12 volt cigarette lighters (supposedly only if you leave them plugged in and they don't have an automatic shutoff feature, but it was a big enough concern for me that finding a battery powered FM transmitter was a major selling point)• Even with the lower voltage of NiMH rechargeable batteries (1.25 volts) compared to regular traditional alkaline batteries (1.5 volts), I've found interference to be rare and only occurring in specific areas, and while it is much quieter than most radio stations, I'm usually only at 50% of my car stereo receivers max volume. Just remember that when you shut off the FM transmitter, you'll get loud static or interference, and if you accidentally change the station on your car stereo receiver, the other stations will be probably *very* loud in comparison to your FM transmitter (at least if you're using rechargeable batteries, or if your batteries are low on power).Cons:• AAA batteries are used. While they're smaller, they're less common and they hold less charge than AA batteries. Alkaline AA batteries hold about 3 times of charge alkaline AAA batteries do, while NiMH rechargeable AA batteries hold about 2 times of what NiMH AAA batteries do. But, this FM transmitter seems to work well and long (at least 14 hours of playback time) with just two well-used 1100 mAh batteries that are over 6 years old at this point.Use the website Radio-Locator to find unused frequencies in your area to avoid interference.I'm using this connected to a Yoton MP3 player, with the FM transmitter's audio cable holding both up onto the phone holder connected to my car's vent. It's somewhat of a janky solution, but it allows me to control the MP3 player and turn the MP3 player and FM transmitter on while having close access to the car stereo receiver's volume controls.

I have been playing with itty-bitty FM and AM transmitters for years, both kit and preassembled, and this one is the best performer and simplest to operate of all the FM units that I have tried. I originally bought it for our COVID19-related parking lot church services, and now have also bought one for myself.PROS1.) BIG PLUS - it comes with FCC certification. I checked the FCC site, and the number is legitimate. The test-related documentation is downloadable and printable. Of course, the certification is not valid if the unit is modified in any way. For example, don't try to add leads for an external battery, which would have the same effect as adding an external antenna.2.) Very simple to set up and operate. Install batteries, plug the short cable into your audio line-level signal source, and turn on the power switch. Then press the button on the front until it displays the frequency you want to use. There are 20 possibilities.3.) Strong signal; easily covers a legally allowed area size. On first try, ours went way beyond what I expected, probably because we put it outside about 8 feet up on a pole and fed the audio to it through a long cable, which may have acted as an antenna. To limit the coverage area, we lowered and relocated it. It now seems to cover the church parking lot solidly, but the signal dies quickly as you leave our property, which is what we want it to do.4.) Excellent audio quality, and it is true stereo, if your input signal is in stereo.5.) Value for $$ spent, although this is a bit iffy, since there is a wide range of prices that sellers are charging.CONSNone so far. I can't yet rate it for longevity or battery life, which Scosche claims is 15 hours of continuous operation. As for how long it will last, time will tell. BE AWARE - this is NOT a Bluetooth transmitter. It works on the FM broadcast band only.There are sites which compare it to "upgrade" models, but since most of those are 12-volt models without power cables that plug directly into car cigarette lighters/power outlets, they aren't really comparable. This one seems to be in a class of its own as far as configuration goes.I would highly recommend it for ease of use, audio quality, and FCC certification.