GPS-1003 Dimension: 10 x 3 mmFrequency: 1575MHzApplication GPS chipset/ module GPS-1003 GPS-703020 Dimension: 7 x 3 mmFrequency: 1575MHzApplication GPS chipset/ module GPS703020 GPS-9520 Dimension: 9.5 x 2.2 mmFrequency: 1575MHzApplication GPS chipset/ module PS-9520