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Nulaxy KM18 FM Transmitter Unboxing and Test

Last Updated: 10 June 2022

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What’s in the Box?

We got a box! The Nulaxy KM-18 Bluetooth FM Transmitter. Safety First! Be sure to keep the blade you used to open the box if you have used one to open your package. Inside the box, you get a love note and directions that look like they are only in English. You also find the aux cord and the transmitter. The transmitter is actually pretty small. It is a lot smaller than I thought it was going to be. That’s cool. You know, I was really hesitant to buy one of these things because of reliability, static, and all that other stuff. At first, I tried to wire up an aux input in my Hummer h3 through the XM radio system. Well, when I tore apart the dashboard there is no XM box, so I tried one of those ISimple things. But that didn’t work either; it just did not work. It did nothing. Nulaxy KM18 is my last resort right. This actually has an aux input, a micro SD slot, and the 2.1 amp charging port. And that’s nice because I will not actually lose my input for my car charger. I can plug it right into this. I just want to try this out. I’m not going to go through all the directions. Honestly, it’s too much. It really is. There have been plenty of videos on how to work these. It is fairly simple, so I think you can figure it out on your own. I’m going to stick to basically whether I like it or not, my opinion of this particular model.

Nulaxy Wireless in-Car Bluetooth FM Transmitter Radio Adapter Car Kit,1.8 Inch Display Supports TF/SD Card andQC3.0 & 5V/2.4A Charging for All Smartphones Audio Players - KM18 [Upgraded Version]
  • [Upgraded Version of Classic KM18]: New KM18 Upgraded with 1.8” TFT color display screen, offers a wider visual interface for more information, such as incoming phone number, track name, FM frequency, battery voltage, Bluetooth connected device and more.
  • [QC3.0 & 5V/2.4A Dual USB Charging]: The Bluetooth car adapter comes with a 5V/2.4A and a QC3.0 charging port to deliver simultaneous high-speed charging to driver and passenger, the charging time is 4 times faster than conventional charging.
  • [Crystal Hands-free Calls]: Nulaxy provides a stable connection and echo-cancellation reduces background noise for better hands-free calls.
  • 【Music Streaming】: Play favorite songs on car stereo through Bluetooth / microSD card / Aux . You can customize music from 5 EQ styles (normal, classic, pop, rock and jazz) and 4 music playback modes (Repeat All/ One/ Random/ Folder) in micorSD Card.
  • 【Safety Feature】: Safety first. KM18 Color is equipped with a voltmeter to show you the condition of your car battery. Voltage should be between 13. 2V to 14. 7V when your car is on and moving. 12. 2V to 12. 8V when your car is parked and ignition is off. IC: 26752-KM18. HVIN: KM18

Testing the Device

Micro SD Slot

Micro SD Slot

Let’s go try it out. I’m going to run it first off of a micro SD card. It actually went in pretty well. For a lot of cameras, phones, and stuff like, those devices that take these SD cards, they go in really deep. So you have to use like a pen cap or something. But for this one, you can actually put it in with just your tip of your finger which is nice.

Compatibility with a Voice Recorder

For the sound, I’m using this Tascam DR-05 that’s clipped up to my visor. And it is way more sensitive than the mics on the GoPro Hero 5, so hopefully, this picks up all the little ambient noise or any hiss or anything like that. This Tascam picks up everything, it literally picks up everything so if you’re hearing the static you’re hearing any kind of odd noises that come out of this transmitter you’re going to know it. Wow! So far this is extremely clear I am pleasantly surprised! It’s not bad. It’s not bad at all! When you turn the volume down, at lower volumes I can hear a little of a hiss. However, once you start turning the volume up, just even the slightest bit is enough to drown that hiss out.

Auxiliary Cable

I’m going to plug in my phone and see how that works. I’m using the cord that came with it. Now, keep in mind you’re going to have to crank down the volume on your phone a little bit so you don’t overload this. Overloading it might overload the car stereo. That’s really nice! I like it! All right, it is cool. I’m hearing a little bit of like interference from something. It seemed to get a little bit quieter the lower on the band spectrum that you go. I guess it’s just a matter of where I’m at. Maybe I just need to move around a little bit. I’m just sitting in my driveway right now. For what this is, I am pleasantly surprised it’s very clear, and it was a total shot in the dark. It was cheap so I tried it. It costs $20 bucks and honestly, I couldn’t be happier with this little guy. They do come in other models. One model has more of a straight piece and it’s just there. You really can’t adjust it. Nulaxy KM18 has got this like gooseneck, stretchy and bendy thing. I got this because I was worried about it getting in the way of my shifter.

USB Charging Slots

Let’s check if the charger works. It does. My phone is an HTC 10 which is actually really finicky. If it’s not charging good enough for the phone, it gives me a warning on the bottom of the screen that says it’s not working well enough. But right now, I’m not getting that and it’s charging perfectly. The connection between this Bluetooth Kit and my car’s DC is pretty tight, so I guess not going to go anywhere.


The build quality on this guy is actually pretty good. The gooseneck part is actually like a metal electrical conduit that you find in a lot of appliances and stuff like that so that it is pretty robust. The plug, obviously this thing is really tight and it stays in there really well. The charger works excellent. The body of the unit itself is actually pretty robust. The buttons feel good. Everything feels pretty well put together. But for 20 bucks? I mean you get an aux port, you get a micro SD slot, and it does Bluetooth. This was totally worth a shot for the price and I am very pleasantly surprised! So, my first impressions of the Nulaxy KM-18 transmitter? It is excellent and has outstanding value. It works awesome that I’m going to keep using this thing for a while. I just got it. If I manage to kill it, I’ll let you know! If you have any questions about this or anything really let me know. I’m usually pretty quick on the replies and a special thank you to all you guys. I really appreciate it. It’s a very good motivation that keeps me going. Alright, guys, I’m out of here.

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