Protective Case with External Battery and Speaker Amplifier for iPhone 4 At a Glance... Anti-fall, anti-bump protective case On-the-go power for the iPhone 4 1500 mAh battery for nearly double the iPhone 4 juice Recharges directly with your iPhone 4 cable 10W speaker amplifier for superior tone quality No setup - just slip in your iPhone 4 and you're good to go! Manufacturer Specifications Color: Black Material: Hard Molded ABS Speaker Amplifier: 10w Battery: Rechargeable li-ion batteries (1500mAh 3.7v) Output Current: <700mA(0.7A) Charging Time 3-5 hours Playback Time about: 5-20 hours Dimensions: 125 x 60 x 19 (mm) Product Notes Easy to carry around Make your iPhone 4 sound better with the powerful speaker amplifier Durable and Comfortable Holder Great for emergencies On-the-go power, enjoy your iPhone 4 without worrying about battery level "Apple" and "iPhone" and "iPad" are trademarks of Apple Inc., registered in the U.S. and other countries. This is not claimed to be an authorized or branded product by Apple Inc. The product and our company are not affiliated with Apple Inc. or endorsed by them in any way. Package Contents iPhone 4 Charging Case 1500 mAh Rechargeable Battery User Manual - English FAQ - Frequently Asked Questions Does this iPhone 4 External Battery Charger work with other iPhone models? This model was designed specifically for the iPhone 4. Is this a solar product? No!