The TASCAM PS-P520 AC power adapter is designed for use with the TASCAM MP-GT1 MP3 guitar trainer. * Because you want to the the best possible results and longest possible life out of your MP-GT1 MP3 guitar trainer, it"s important to use the proper adapter. * The PS-P520"s handy, compact design makes it easy to take with you in your case or bag. * Also capable of powering other units, such as the CD-GT2, CD-BT2, CD-VT2, and DR-1, the PS-P520 makes the perfect power accessory! TASCAM PS-P520 AC Power Adapter for MP-GT1 Features: Designed to power MP-GT1 MP3 guitar trainer 5V Compact design Also works with CD-GT2, CD-BT2, CD-VT2, and DR-1 models.