The BU-353-S4 is a USB GPS receiver that features a highly sensitive, low power consumption chipset in a ultra compact
form factor. The BU-353-S4 is powered by a SiRF Star IV GPS chipset, and will provide you with superior performance in
urban canyons, and in dense foliage. With the SiRF CGEE (Client Generated Extended Ephemeris) technology, has the
capability of predicting satellite positions for up to 3 days in advance, and will deliver a CGEE-start time of less
than 15 seconds under most conditions without any network assistance. The BU-353-S4's MicroPower mode allows the
receiver to stay in a hot start-like condition almost continuously while consuming very little power.