Built in Flash Memory               2 GB, 4GB Processor                        SigmaTel 3550 Transfer Type        Actions MTP Firmware Version        B700K8R_V1.0 Firmware Date        2007/7/10 Core Version        9.1.52 Core Date                        2006/5/22 Music Formats        Unprotected MP3, WMA,WMV                                 Protected DRM10 WMA Certification        Plays for Sure 2.0 (PFS) for protected WMA Player Compatibility        Windows Media Player 10 and 11 Music Service Compatibility        All WMA protected content sites such                                                 as Urge, Napster Music Service Compatibility        Must play both purchased and                                                   subscription songs Video Format        AMV/ASF LCD Display        1.5 – 2.0 inch, color, ?128x128 pixels Language                        English Power Source (Internal)        Internal rechargeable battery Power Source (External)        US wall converter (120VAC) or USB cable/PC Recording Sample Rate        WAV (32 Kbps) FM Tuner                                        87 - 108 MHz (US/Europe/World) Frequency Response                        20Hz – 20KHz Frequency Loss                        <0.1% SNR                                        >85db Transmit Data Speed                         >4 Mbps (USB 2.0) Power Output                        >10 mW Headphone Output Connector        3.5 mm Working Temperature