Audiovox GSM/GPRS CompactFlash Card Module for PDA (RTM-8000P)
RTM-8000 enables to call via GSM networks, supports SMS. RTM-8000 operates in 3 frequency ranges: GSM 900/ DCS 1800/ PCS 1900 MHz. Still, the device requires a SIM card; itself it has Type-1 extended Compact Flash form-factor (62.5x42.8x9 mm).