Pocket Projector for iPhone 4 Devices. Easy to use - just dock your iPhone 4 device and project videos or iPhone Photo Slide Shows onto any surface. Perfect for travel, meetings or keeping kids entertained on the go. Super-bright 15-lumen projector lamp ensures clearer, more brilliant images 640x360 native display resolution - projects up to a 50" image Built-in 0.5W speaker and focus adjustment for an optimum viewing experience Built-in 2100mAh battery functions as a back-up battery for your iPhone 4 device when fully charged Take the show on the road. Our Pocket Projector for iPhone 4 is perfect for on-the-go travel entertainment. Its super-bright 15-lumen LED projector lamp ensures clearer, more brilliant videos and iPhone Slide Shows than other pico projectors. 640x360 native display resolution projects up to 50" (diagonal) images. Focus adjustment lets you control image clarity while the integrated 0.5W speaker delivers the audio. Great for keeping kids entertained with their favorite videos on the road! Rechargeable - powers your device, too! The Pocket Projector's built-in 2100mAh battery charges via USB connection with the included cord. When fully charged, the projector may also be used as a back-up battery for your iPhone 4 device. Take your video to go with our Pocket Projector for iPhone 4. Order from Brookstone today! iPhone not included. iPhone is a trademark of Apple Inc., registered in the U.S. and other countries. "Made for iPhone" means that an electronic accessory has been designed to connect specifically to iPhone and has been certified by the developer to meet Apple performance standards. Apple is not responsible for the operation of this device or its compliance with safety and regulatory standards. Please note that the use of this accessory with iPhone may affect wireless performance.