(Upgraded Version) Bluetooth FM Transmitter, Sumind Wireless Radio Adapter Hands-Free Car Kit with 1.7 Inch Display, QC3.0 and Smart 2.4A Dual USB Ports, AUX Input/Output, TF Card Mp3 Player

I bought a used car back in February and to my dismay, the aux port was damaged. I (stupidly) did not get the warranty. I was hoping to use the aux port to connect my Amazon Echo or this Bluetooth adapter I had.I was very upset until it hit me - I could just get an FM transmitter. My brother-in-law has one and it works great. I went on Amazon and found this one. I read through a couple of reviews and bought it. It was something of an impulse buy, but I am so glad I did.It works very well - connects to my phone as soon as I power on my car, unlike my Amazon Echo Auto, which I don't miss. I have to turn the sound up on my phone and radio to hear anything but that might just be due to the technology. Once it's at the volume I prefer, music sounds great. For the best results I tuned the transmitter to the end of the FM spectrum and I haven't had to deal with interference with other radio stations.This unit has features that I haven't used yet, such as the aux port on the side, and I just realized that you can put in a micro SD card in it. I will have to try that out as sometimes I don't want to launch the music app on my phone and find something to play. I also love the button you use to answer the phone, and didn't realize you could long-press it for Siri (since I have an iPhone) so I will have to try that out.Initially connecting it to your device is also very easy, as I recently upgraded my phone and had to pair it again. I also love the two charging ports, as you can use it to charge anything else. I used one port to charge my MagSafe charger but I broke that cable by accident.I came back to this listing to buy it for my dad as he needs one, and remembered that I wanted to write a review for this, so here it is. I think I paid $29 for it, and it was worth every penny. It works very well and I love it.

Part of me expected to be disappointed by this, but the idea is just so great I wanted to give it a shot. So far it's performed at or above expectations! I really only use it for one thing, so that's where the 5 stars is coming from...note that things I *don't* use it for may perform much more poorly (perhaps the FM transmitter isn't very strong, etc). I connect my phone to bluetooth, and use an aux cable to connect this device to my car's stereo. It pairs automatically when I turn the car on, and works just as expected. I think what makes me so excited to use this is that it makes it much easier to 1. Change the volume and 2. Skip songs, vs doing those things on my phone or on my car's stereo (I do have a fairly old stereo, but the volume dial is too shallow to grab and twist easily without looking. I can't skip songs on it at all). The display shows my car's battery voltage at startup, which is a nice touch, for an old car like mine that can be valuable info. Oh, and two USB ports are super handy, I use those.Here is my feedback/disclaimers, though. These are things I wish were there but aren't dealbreakers for me, or things I haven't tried at all:* Haven't touched the FM transmitter* Haven't really used any feature beyond what I've described...the SD card reader, the hands-free phone calls, etc.* I wish there was a play/pause button.* I don't think the display shows song info? I thought that was an advertised feature. I mostly use Amazon Music instead of the native music app, maybe that has an impact on this, but it shouldn't. It doesn't bother me, though; I know my songs well enough to not need them displayed.* Number one complaint: it appears that the device sounds (most notably, the "waiting for pairing" and "device paired" notifications, which are spoken) are *not* affected by the relative volume of the device itself!! This to me is a major oversight...what it means is that when I first turn on my car, that voice telling me it's trying to pair is LOUD. I leave my car's stereo volume really high and just allow the volume control on this device to be the governing factor, but when the device audio isn't quieted by the device volume, it's an issue! So, you know, don't let this thing give you a heart attack like it did for me the first few times. It's still an annoyance, heart attack or not. I debated taking a star off for this, it really is a mistake. I'm curious if some kind of settings or something could adjust this (I didn't get any instructions with the device).So, to reiterate, *for my purposes,* this is totally a 5-star item. There are many similar items around, maybe a cheaper one would be just as good, maybe some of these other features don't work very well, maybe this thing won't last too long, but for now, I'm pretty dang happy. It solves a problem I have in a well-done way.Update: it’s been about a year and this device is still doing its job just fine. The loud pairing voice thing is still annoying. I actually think the issue may be that the device has no volume memory, it just resets to a (fairly loud) default every time it’s turned on. I keep my stereo volume a bit lower now, so it’s about right at that default volume. I have to mess with my stereo volume when I want really loud music, but this isn’t very often so the lack of volume memory isn’t a huge deal. Definitely still wish there was a play button, or that it would auto-play your music when it pairs. I’ve used other similar devices since writing this review, and I gotta say, the auto-pairing for this is lightning fast compared to many.

Got this for my mother who needed a bluetooth receiver in her older car to listen to books on tape. Library and Audible put everything on the web now, so she needed to use her phone rather than old style CD input that her car provided.Bluetooth connected effortlessly and played sound over FM. I could not however get the AUX to work. I figured it'd be much easier to go from bluetooth to aux directly (and avoid having to find FM station open) however it appears the AUX input/output is really input only and doesn't function bi-directionally as advertised. Have to knock it a star for that as I was really hoping not to have to explain to parents how to find a "static-ish" FM station to broadcast on. They have the aux... sadly their phone doesn't have the aux output anymore as everyone is cheap in the cell phone industry.Hooked up and was pleasantly surprised that the device also provided battery voltage monitoring! It flagged that the battery was low and needed a new charge. Saved her some trouble before the winter hit. Guess she needs to drive more or replace that battery!Aside from Aux issue, no problems with device with several trials and setups. She's up and going no problems!