Combine the u-Blox chipset with Sarantel's powerful SL1206 helical antenna and you get the impressively sensitive GS407. Whether this receiver is in your pocket or under your car seat, you are likely to pickup a rock solid GPS signal.
u-Blox 5H chipset
Sarantel omni-directional Geo-helix SL1206 active antenna
2Hz Update rate
Fifty satellite tracking channels for fast acquisition
Supports UBX data protocol at various standard baud rates
Filtering effect of the antenna gives high immunity to RF interference