So I don’t even know where to start other than glass is where it’s at for sound My first purchase was the DIY guitar amp/mp3 speaker I was immediately impressed by the fullness of sound and audio clarity that this product offers shortly there after I returned looking for a second DIY guitar amp MP3 kit and stumbled across their Bluetooth speaker with its obvious Bluetooth capabilities and 1/8 auxiliary input +rechargeable battery you can’t go wrong I found myself using it so often that I had to buy another one and while writing this review I saw that they now come in a bigger size the 30 ounce which I do not personally own yet but watching a YouTube video definitely provides more bass and sound incredible as well