BenchTech&trade; BT2004-K RE-Recordable Key Button Sound Module with Re-Chargeable Li-ion Battery MP3 Play USB Download for Greeting Cards Toys Gift Music Box RE-Recordable Button Key Play Re-Chargeable Li-ion Battery, 150mAh USB download with PC computer(USB cable include in package) 4M Byte(32M bit)storage space No driver need for Windows or Apple iOS