Nulaxy Bluetooth FM Transmitter for Car, Wireless Car Bluetooth V5.0 Adapter with Big Color Screen, Support QC3.0 Fast Charging, Hands-Free Call, MP3 Music Player BASS&TRE Booster, TF Card AUX-KM28

Lots of fancy pics in the listing and lots of positive reviews, but no useful details on the specifics of how this unit actually works so here you go- -This unit will play MP3s and other music formats from a USB port or microSD card slot on the unit -Stream music/sound via Bluetooth from apps on your phone -interface with phone for making and recieving calls -charge devices via two USB ports at the cigarette lighter plug First and foremost, this unit has a 3.5mm/ 1/8" plug on the bottom of it. This is a variable line-level OUTPUT to feed audio signal from this device to the AUX input on your factory system. It is NOT an "AUX IN" that adapts the audio from an external device to broadcast via FM to your factory radio. Secondly, this unit has "bass" and "treble" adjustments for some reason; do not use these- just leave them at zero. I believe that the distortion in sound noted by other commentors may be partly caused by maxing these out. Thirdly, the "volume" control on this unit (1-31) is NOT meant to be used as a volume control. This is a gain/level matching adjustment same as you would find on an external car audio amplifier. The proper way to set this is to tune your radio to a regular station or play a tape/CD, then switch back and forth between that source and this bluetooth unit and adjust the gain on this unit up or down to get the volume as close as possible to the native source. Again, the distortion in sound that other people are complaining of is likely due to maxing the "volume" on this unit at 31 and overdriving the input of the factory system. This gain level defaults to "25" every time you powercycle the unit. I have matched it to my factory radio's AUX in and it sounds best between about 19-23 so I have to turn the gain on this unit down a couple notches every morning when I first power it up. This gain number is always displayed at the top edge of the screen so you can see it at all times. Once this gain level is set you use your volume and EQ settings on your factory radio as normal. It's also worth noting that when connected to your phone via bluetooth changing the volume via the buttons on your phone will also chage the level on this unit, and the number on the display will change accordingly. I have not used the FM transmitter function but as far as I can tell it transmits on the selected frequency at all times and I have not found any settings in the unit to disable it. I use this unit in my work vehicle primarily to play MP3s off of a micro SD card. I plug it in first thing in the morning and it is in use for 8+ hours, 6 days a week. It has performed great for the last several weeks. I also occasionally stream music from Spotify via my phone and the bluetooth connection. Again it works great, sounds great all day long. I don't chat on the phone a whole lot in the car but when I recieve a call it shows the name/phone number on the screen and declares the number through the audio system so I know who is calling without having to look down at the screen. I can then press the large knob to answer the call. This unit is controlled primarily with the large knob right of the screen. It has positive detents when turned and a solid feeling "click" when you press it. You press and release to answer calls, or pause music. You press and HOLD to enter the menu where you can control more advanced functions. When in the microSD card mode, the first option on the menu is "local folder" which is where you can access the folder structure of the microSD card or USB thumbdrive and navigate through your music same as you would on any cheapO portable MP3 player/ipod. The only critisizm I have of the unit would be that when you spin the wheel it sometimes goes in the opposite direction "up" instead of "down" so you have to keep an eye on the screen to make sure it's doing what you're commanding it to do. Added bonus- I ordered the "yellow" color unit and it actually matches perfectly with the light brown-tan colored interior of my car. Not sure where they got YELLOW from but you can kind of see in the photos that it is clearly not even close to yellow in color

This is a great product. It does what it promises. Audio is full. (the built in Bass & Treble are minimal, luckily my radio has a built in EQ which further tailors the sound. Make sure to turn up the volume on the phone all the way. Turn the volume on the Nulaxy up all the way. Then starting from the lowest position possible on your radio head unit, turn the volume up where it sounds good/loud enough. FM transmitter is strong, but it is very close to the antenna itself, I realize it is impossible to find good FM transmitters since the FCC limited power on them years ago. The mounting clip is awesome. Different positions abound. The display is colorful and full of information. Time will tell how long this lasts. ------Only thing I do not like? High chance of fail point, where the ciggy lighter cord enters into the Nulaxy unit. Would have been better it was a jack so it can be removed and absorb abuse much better. If the wire bends too much, it WILL fail one day and is not a self serve replacement part of the amateur/common user! - Highly recommended for the price!

I have a van from an era where there was no real reason to hook up your phone to your car (also known as not that long ago). That mean no native bluetooth connectivity, no Aux input (or more correctly any port use to send audio to the radio), only an cd player, tape slot, and a good old fm receiver. When I finally reached the point where I could not longer physically stand the local radio stations, I was in trouble. I needed to find a way to listen to something better, something I could access on my phone. I am not made of money and I was not looking to spend more than $30.00. I tried those tape adapters, but they did not really work consistently, especially since my sister thought the best way to make them work was to pull on the audio jack, which over time fully broke them. Then one day while trying to buy yet another tape adapter I saw something that gave me hope. I saw a bluetooth to fm transmitter. Quickly I changed the search terms and found this product. My expectations were not all that high given that at least five other legitimate listing of this product sold by other companies (Clearly this was a generic electronic sold to companies who then stick their own branding on it, which is not uncommon). My first month or so with it was mediocre, and the fact I can even say that is an amazing thing. I had an issue with the cigarette lighter (That is what car power ports are called because of their original use) this product was plugged into. The port was very loose, to the extent that plugging in a USB to charge my phone would power off the transmitter. Somehow though with this product getting the most unstable power provided to it, it was still able to transmit with a barely acceptable amount of static (unless the windshield wipers were on). Eventually I fixed the cigarette lighter and the world changed. The static was mostly gone (it is still barely audible in the background of the music and of course in the silence), and I could charge my famously low battery life phone with its preferred amperage 2.1 amps (and 5 volts but anything powered via a USB port will be 5 volts), which means that I could top off my phone pretty effectively on even short drives. The fact that it attempts to auto connect to my phones bluetooth when it is powered on is amazing, because I don't want to spend too much setting it up before I drive. Actually, the only setup I have to do is play my music on my phone (given that my bluetooth is on, and the radio station has not been changed). The initial setup was not all that difficult either. All I had to do, was plug it in, pair it with my phone (It is always set to pair mode when no device is connected, and the name is displayed as T10), set the fm frequency (or channel or station whatever word you prefer) I wanted it to broadcast on and change my radio to the frequency. For better sound quality it is recommended to set the frequency to one not already being broadcasted on. In my area 100.1 (mHz) was just static so I chose that. It should be pointed out that if some person rolled up to me at a stoplight and was enjoying listening to the static (Not judging) on 100.1, they would hear hear what ever I was listening to. Of course unless by chance the person in the next lane was listening to the static on the exact same frequency I was broadcasting (There are a lot of open frequencies in a given area so this is not a high chance), this will never be a problem for you. If you are a person who uses this to make calls, someone could (either by a small chance or by a lot of planning) listen to what the other person was saying (They could not hear your voice as it is not transmitted on the fm side). You could solve that by going on your phone and setting the device to only receive media audio and not call audio (This works on android, but I am not sure if those who use iPhone have that setting, but maybe that is a good reason to switch :) ). One problem I can see (but have not had the chance to encounter... yet...) is while travailing you might end up in an area where there is a signal being broadcasted on your chosen frequency. Depending on where your cigarette lighter is this could be more or less of a problem (I am on the more sadly because I need to duck down to read the display on the device). To address some questions I saw about this product: PLEASE READ BEFORE ASKING A QUESTION ~There is no power button. If your cars is one that continues to power the cigarette lighters when the car is off and keys out of the ignition, remember to unplug it. I should note that very few people will have to worry about this. ~You cannot change the bluetooth display name without firmware modifications. ~It does not have a caller ID feature, or a now playing feature. The LCD Display listes the name of the connected device and other status indicators. On start up it does diplay your battery voltage (The number should be between 12 and 15. If it lower than 12 your car battery might be dead (: ) ~If your device's paired and unpaired voice messages change languages on you, press the center circle button for 5 seconds or so. ~This device will work as long as you have: 1. An FM radio in your car. 2. Your phone has bluetooth connectivity, or a headphone jack or you have a micro sd card with your music on it. 3. A Cigarette lighter port in your car (THE STANDARD CAR POWER PORT) 4. Your car battery is not dead (: 5. There is power going to the device ~The neck is flexible to an extent ~You need to press the skip track button to switch between bluetooth and sd. ~The FM Station can be changed (in a pretty standard fm range) ~Cannot transmit on AM frequencies ~You can use hands free calling if you want. ~All setting are remembered when it is powered off. ~Q: Does this work with *Name of phone* A:Bluetooth is Bluetooth is Bluetooth. If your phone has Bluetooth it will work. ~The USB port is for power only. You can charge your phone (or other usb device) thats it. ~It does have "Fast charging" which as of the current time is any device which outputs 2 amp power. ~You can only pair with one phone at a time. to connect a different phone you must disconnect the first. ~To use voice commands you have to start what ever voice command prompt on your phone. ~It can transmit any audio app on your phone, controls will vary, but works with most major audio apps. ~Q: Can I listen to *audio source* while waiting on a call A: A call will pause you music until you end or deny a call. Unless your car radio can play to sources at once (it can't) you will not be able to play a cd, or sirius xm (unless its trough your phone) or a tape or a different fm station and wait for a call.

Easy to set up and simple to use. Good sound and Bluetooth hooked to my phone easy. Very clear sound but I do recommend turning off all equilizer and sound boosters in phone so it will sound clear. Quality is great and the size keeps it out of the way.

This FM transmitter works as expected, giving good and stable bluetooth connection to my phone and FM connection to radio. The quality of the microphone is satisfactory, the other party hears me well when I speak. The charger charges fast enough. What I wish was different was that the caller's name was shown on the screen. Bigger font would come handy. Not all buttons are illuminated, so sometimes it's harder to find some of them in the dark.

Hasta el momento no he tenido ni un solo problema, funciona correctamente, excelente producto.

Many Thank you to the entire Nulaxy team, I did have an issue with the original item, and within a day , from the after sale support, Anita, not only was the issue resolved, the replacement item arrived the next day, well packaged and ready for use. The item itself is small enough not to clutter the dash, the screen is large enough to easily see and operate, function buttons are well placed and are responsive to touch, the multi function knob is precise in function, for volume, taking and ending calls, during music playback, a short press brings up the menu for the equalizer with popular presets to choose from, each preset has a audible change when selected, a working feature, the graphic eq has a spectrum display, bright enough to see in daylight, illuminated, yet soft enough not to be a distraction in the night. Bluetooth connection is very fast and solid, no interference, call reception is clear inside of car, the person on the other end hears the call like it is on a phone speaker, unless they take the call on a Bluetooth in their car. Either way, sound quality is present without being garbled. Same goes for music playback, uninterrupted playback, clear sound connection. The USB and SD card is read and displayed, playback is clear and uninterrupted from signal loss. Charging port is a handy addition, charges well and does not affect playback. A long press on the treble button will turn of the item, otherwise, the item turns off and on with the vehicle. What makes this product stand above other similar brands is the complete customer service, from purchase to after sale care, the Nulaxy company is staffed by people who are sincere in their offerings of products and are committed to standing by and protecting their reputation and will certainly make available a positive resolution to any issue. A trusted company, will recommend and purchase from them again.

Funziona perfettamente con la radio originale della Toyota corolla verso 2005.

Lo uso cada vez que cojo el coche. El sonido de la radio y playlist del móvil es excelente