Instantly get your Pocket PC or notebook to go wireless with GPRS. Provides voice communications and high-speed, GPRS data transmission. Can act as a fully functional Tri-band mobile phone. Can act as a standard wireless GPRS modem in a notebook computer, enabling data speeds up to 57.6 kbps (Requires a CF - PC Card Adaptor PX1105E-1NMD). External Headset: For Audio Input/Output, Ear-microphone included. Requirements: For Pocket PC: Pocket PC 2002 or 2003 with ActiveSync on host system. For PC: A PC running Windows 98/Me/2000/XP