1 .Support for 64MB~ 4GB flash memory 2 Support for high-speed USB2.0 3 Weight: 12G Product type: AX-451 Name: Stone2: support for 64MB~ 4GB flash memory capacity;In 3 formats: MP3, WMA audio format decoding;4: support for high speed USB2.0interface5 battery: lithium battery, can continuously play 5-8hours6 weight:12G The supply of MP3, MP3 player, MP3without screen