Cassette tape to MP3 converter-these tape players are compatible with various tapes. By connecting the cassette player to the computer via a USB cable, you can convert old cassette tape music into MP3 format files. Then you can play these mp3 files on computer, mobile phone, mp3 player or burn to CD$ Convert the tape to MP3-it runs on battery or USB power. In addition, when it is connected to a USB power supply or to your computer, this cassette does not require batteries and is easy to use. You can use the power bank as a battery Box Walkman-The compact size and suitable weight allow you to conveniently enjoy music anywhere through the 3.5 mm jack earphones (included). No need to install or driver$ Various compatibility-Compatible with Windows XP, Vista and Windows 7, and the Mac version is lower than 10.5. Flexible battery (not included) or USB powered operation$ Audio cassette player-The audio cassette player can be powered by 2 AA batteries (not included) 3V DC or USB 5V DC power supply