Escort Mobile Digital TV uses broadcast airwaves reserved for digital TV to deliver video to your iOS device. * No 3G/4G, Wi-Fi, or data plan is required, and it does not use your existing data plan. * Access major network TV with Dyle mobile TV coverage - no subscription fee * Built in battery with approx. 2.5 hours of viewing and 30 hours of standby (up to 9 hours of viewing with iPad 2) * System Requirements: iPhone 4S: iOS 5.1 or later, iPod touch 4th / iPhone4 / iPad2 / iPad1: iOS 4.3.3 or later, The new iPad: iOS 5.1 or later