Protective Case with External Battery and Speaker Amplifier for iPhone 4 Protective Case with External Battery and Speaker Amplifier for iPhone 4 - 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 4's sub-par speaker actually sounds as good as it looks. Pleasing to the touch, this lightweight and durable Protective Case allows optimal access to all sensors, ports, and controls on your iPhone 4. Installing it is as easy as plug and play; simply open up the case, slide the iPhone 4 inside and connect it to the dock connector. Next step? Go play with your phone's extended power, because you're good to go! Amplified Sound Enhancement :Finally, the way your iPhone 4 is suppose to sound. Whether its games, music, or video playback, the 10W Speaker Amplifier on this case will offer audio in a louder, richer, and fuller sound quality. Instant boombox iPhone 4, anyone? More Power, More iPhone:Get the most out of your iPhone 4 with this Protective Case's High Capacity External Battery. At 1500 mAh, that's almost double the usage time for talking, texting, gaming, FaceTime, browsing and even standby. Why? Well frankly, what's the point of a smartphone if you're afraid of using it due to battery life? Combining elegant design with usability, this External Battery Case with Speaker Amplifier is one unique iPhone 4 accessory that can't be missed. Available at a factory-direct price, get the most out of your phone without breaking the bank.