The 5012D-U GPS Receiver + Antenna incorporates a highly sensitive 16-channel, very quick time-to-? x GPS Receiver, and a high performance active/? ltered GPS antenna. It features high performance GPS Engine with embedded ? ash memory, a Low Noise Ampli? er, SAW ? lter, as well as a precision tuned ceramic patch element for maximum GPS signal reception. The 5012D-U High Sensitivity GPS Receiver + Antenna is housed in a compact, rugged weatherproof magnet or screw mount enclosure.