Portable Speaker and Case with Back Up Battery for iPod Touch 2nd and 3rd Generation 3 in 1, portable stereo speaker, case and back up battery in one Compatible with iPod Touch 2nd and 3rd generation (this speaker is not compatible with iPod Touch 1st and 4th generation) High performance stereo speaker (3W, 1.5W * 2) with 16 stages of volume control. Simply slide the speaker upward to play your favorite tune and charge your iPod Touch High capacity (1,700 mAh) back up battery for your iPod Touch Crystal case for iPod touch and USB cable (included) to charge and sync your iPod Touch