Protective Case with External Battery and Speaker Amplifier for iPhone 4/4s - Give that shiny smartphone the power boost it needs to make it through the day. Also includes a built-in speaker amplifier so your iPhone’s sub-par speaker actually sounds as good as it looks.
The Perfect Fit
Pleasing to the touch, this lightweight and durable Protective Case allows optimal access to all sensors, ports, and controls on your iPhone 4s. Installing it is as easy as plug and play; simply open up the case, slide the iPhone 4s inside and connect it to the dock connector. Next step? Go play with your phones extended power, because you're good to go!