The mini iPhone speaker amplifier uses the same tried and true acoustical science that’s been around for centuries. Like most things in the iWorld, the speaker amplifier is made out of quality materials; in this case a sturdy plastic that won’t break from something like a simple fall. The mini iPhone speaker is ideally designed for the iPhone 4 and is attached in the same manner as most other accessories. Once the phone is on, the speaker will increase the audio by a respectable 13 decibels, taking your speaker calls to a whole new level. Available in a variety of colors from red, to blue, yellow and every other color on the rainbow, it’s the perfect outdoor accessory for your trendy iPhone.