The OontZ Ultra-Portable Wireless Bluetooth Speaker by Cambridge SoundWorks
Usually I don't bother writing reviews, but I had to for this product.  It really is the best bluetooth speaker $50 can buy.  It has great clarity, even EQ, and gets loud enough for a medium size room without distortion.  It really packs a punch for its size!  Also, I was reroofing my house all day yesterday (about 12 hours) and used this the whole time on full volume (on both the Oontz speaker and my iPhone 5S) and it lasted the entire day without needing to be charged; needless to say, I am overly impress