I really like the clean simplicity of the design for this Mini Koo Non-Electric Speaker. Essentially it’s just a wooden amplifier but a beautifully crafted one at that. It’s made from walnut and fits all iPhone sizes to increase the volume of your music without cords or electricity. Very elegant.
Wireless Bluetooth Speaker- BLKBOX POP360 Hands Free Bluetooth Speaker - for iPhones, iPads, Androids, Samsung and all Phones, Tablets, Computers (Bumpin' Black)
Anker Premium Stereo Bluetooth 4.0 Speaker (A3143), 20W Output from Dual 10W Drivers, with Two Passive Subwoofers, Portable Wireless Speaker for iPhone, iPad, Samsung, Nexus, HTC and More