ABRAMTEK Headphone Amplifier Bluetooth Receiver, Portable Audio Enhancer Amp for Earphone Headset Speaker, Wireless 3.5mm Adapter for Home Car Stereo Sound System, Metallic Gray

I wanted a little boost in the audio and thought I would give a couple of different audio boosters a try. The other brands I bought didn't last but a few weeks, but this one has been working great since day 1. I don't know how these work, but definitely makes a difference in the audio quality and sound. My car already has a Harmon Kardon system but wanted a little more, plus I needed Bluetooth audio. Works great and sounds great.

I use this in conjunction with a fm transmitter and my surface book, as the surface book has no connections without the keyboard attached I had to find a way to convert my non bluetooth fm radio/speakers to be usable. I pared this with the book and then plugged in the transmitter, tuned the radio to preset unused station and now I have louder sound than was previously possible with the built in speakers.

This product is just terrible..was exited to try it. Was very disappointed bec made my wired solo 2 sound worse than my cheapest pair of Bluetooth Devices. Don't want your money stick to wired with a cheap amp like the one also in the pic for this (amp) or whatever it is.

a bit of a learning curve but does what it says it will do. be sure to chare it and other lithium ion power units periodically or the cells will go dead due to ion depletion on the cathode.

Adds some extra volume to helmet speakers , with out any distortion.

Really hard to set up. Hard to figure out how to use it. It's in a box of other useless things that I've wasted money on.

Pretty incredible product. Bought for my Bose headphones (sounds flat, no bass) and whoa!! whoa! the 60 headphones sound incredible!

Great