The AT2775-557 is L1/L2 Low Profile antenna

The AT2775-497 is a light weight Antenna for tracking L1 & L2 signals, fix mount with MMCX Male right angle connector.

The AT2775-383 is a high performance L1/L2 band GPS antenna. Its ruggedized all weather housing protects it from the elements under the most extreme conditions. It has exceptional capability to pick up satellites low on the horizon which is beneficial in rough sea conditions.