Globalsat USB GPS Receiver (Black) About the bu-353-s4 USB GPS receiver the bu-353-s4 is a USB magnet mount GPS receiver that features a highly sensitive, low power consumption chipset in a ultra compact form factor compatible with MICROSOFT windows 8, as well as 7, vista -xp. The bu-353-s4 is powered by a sirf star iv GPS chipset, and will provide you with performance in urban canyons, and in dense foliage. 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. The bu-353-s4 is suitable for the following applications: automotive navigation personal positioning fleet management mobile phone navigation marine navigation bu-353-s4 package contents: bu-353-s4 USB GPS receiver (1) suction cup cd-ROM (user manual - GPS info test utility).