Decent device. OK sound.
586044
Sound quality is OK. Range and battery life is good.
2825832
Just OK, while using bluetooth not very loud, better if using a wired audio input
1433256
Not a bad device for the cost.  It doesn't have an earphone jack, which I found as a disadvantage.  Beyond that, I am enjoying it.
4425048
So, the main feature for getting this is the ability to broadcast on two speakers from one device.  This function does work but can be buggy.  The sound quality is pretty decent.  We recently used this with a speaker in a different room broadcasting from a tablet during a party and it was ok.  I think the app needs a bit of improvement with the dual broadcasting.  Aside from that, we got them at a decent price and they do the job.  Would recommend if you are not paying retail price.
4805240
Its OK...sometimes my listener says I sound muffled.  However, no setup required. It's OK for the price.  It is quite acceptable.
238153
Nice product for my purposes. The sound is a little tinny, but ok.
4271243
A reasonable product that provides good sound quality at a decent price. The sound is good but not great but does get the job done and is a bit unidirection and I wised it had a more surround capable quality, but for the price you can't really complain.
693541
Decent sound and volume, controls are not very intuitive but they are comfortable. No volume control on headset, what looks like it should be volume is advance/back song list. non-standard charger is annoying
186610
I use these mostly for listening to music while I'm at work.
They sync'd easily to my iPhone and Kindle. Battery life seems to be pretty good - I've used them for about 5 hours and have yet to charge them. Range is pretty good as well. I can go back and forth from the printer (15 feet away) and back to my desk where my iPhone is without them being disconnected.

The reason these got 3 star is the sound quality. When playing music the sound is a little muffled. I'm comparing the sound to the $30 pair of corded earbuds I've had for 3 years.

Overall for the price and what I'm using them for they were a good buy.
2915027
It's OK. Nothing special. It works fine but the volume isn't very loud. I give it 2.5 stars.
1310505
Easy setup. Pretty decent sound quality if your other device is within 10 feet. Beyond that it suffers a lot.
2017130
It's ok sound, not great. It crackles a lot, if not on charger even worse. But for the price and the size it does a decent job.
1445889
Not the worlds best sound,but it is doing what I wanted it to do. Sound is closer to me that it was.
1475762
It's ok.  Not loud enough.  Battery last a while though.
1272923
Easy to use. The sound quality is just so so. If using Bluetooth, the volume is too low.
2954988
This is a little device which will convert a Bluetooth stream into an audio signal, suitable for either headphones or as an input into some sort of amplifier. I am not sure how useful this is, since every device in the world seems to have a Bluetooth receiver in it, but if you need this function, this device worked well.

=== The Good Stuff ===

* The unit is a small size (2" x 1" x 1/2"), and weighs about 1/2 ounce. Things don't get much lighter, so it is a nice accessory for headphones or anywhere you don't want a lot of weight.

* The package has everything you need- the receiver, a USB cable to charge it, an audio cable and a male-to male jack for audio output.

* The sound quality is certainly acceptable for most uses. I wouldn't trust it to handle signals for my home audio extravaganza, but for portable electronics, it works just fine. You can turn it up loud enough to cause some distortion in your headphones (depending on the model), so if you are into headbanging music, might want to look elsewhere. For normal listening volumes, it is certainly acceptable.

* It paired up to my iPhone6 with a minimum of fuss. Took about 45 seconds the first time, but subsequent power ups have gone much quicker. The iPhone recognized the track and volume buttons on the receiver. The phone functions worked, although I didn't find it practical for serious calls The real problem is the microphone sensitivity and location. Unless you are willing to hold it close to your mouth, it isn't going to sound real good to the person on the other end of the call.

=== The Not-So-Good Stuff ===

* The downside of the lightweight case is a flimsy case. It feels like it will fail, although it has held up for the first two weeks. There is some noise when you push the up/down buttons, something I find annoying.

* I am not a fan of "multi-function" buttons. The same button turns the receiver on/off, puts it in bluetooth pairing mode and answers the phone. It works as advertised, but I never seem to be able to remember how long to press for what function.

* The instructions are not written in the greatest of English, although operation is fairly straightforward.

=== Summary===

The receiver works as well as you would expect. It is not a big stretch to cause the amplifier to work beyond its limits, but this is not a $1000 amplifier. I have some concerns about its long-term durability, but nothing has failed in the first two weeks. The small size and light weight make it a good match for portable bluetooth applications.

=== Disclaimer ===

I received this unit as an evaluation sample. I have no interest in the company or any of its employees.
2249669
The device looks and feels rugged, but the audio quality is unimpressive