Waterproof USB SiRF Star III GPS Receiver for Windows and Mac The BU-353 GPS Receiver can be utilized in a variety of applications that require a magnetic mounting with waterproof configuration. It''s incorporating the latest SiRF Star III GPS chipset and an active patch antenna so you receive a high degree of GPS accuracy. Combining both design and technology into an iF product design award 2006 winning GPS receiver. Typical application can include marine environments, aviation, commercial use such as fire truck, police cars and utility vehicles and buses. The extended 5 feet long cable allows for easy routing to your PC behind headliners and side panels and terminates to a custom USB connector.