According to Clarkes Third Law: Any sufficiently advanced technology is indistinguishable from magic. Air Curve Play is based on some very advanced technology, indeed. & when you hear it, you will agree it is magical. Air Curve Play makes the speaker of your iPhone 10 decibels louder. no, really. & it works without batteries or cables or power adapters or incantations. Just slip your iPhone into Air Curves rubber dock gasket, & your iPhone 4 becomes the perfectly portable audio/video conference phone, & self-contained music player & video viewer. Without revealing the secret of the magic, we can tell you that Air Curve is a cleverly designed acoustic amplifier that collects the sound from the built-in speaker of your iPhone, amplifies it in a built-in coiled waveguide, & projects it out into the room. Air Curves transparent polycarbonate body lets you appreciate the waveguides graceful curves, inside, that do all the work. Thats some great-sounding mojo.. 10 d B. louder. Magically.