Item 1: this high signal gain, high quality external GPS receiver antenna will not just help your GPS device receive a lot stronger satellite signals, but it will also improve your location coordinates much more accurate. There are areas where your GPS device will not able to get a satellite signal and need extra helps with this external powerful gain GPS antenna receiver of up to 42dB gain, gain range is 32dB - 42dB.
Simply plug one end of the MCX gold plated angle connector to your GPS device, the other end is the square color black antenna receiver unit with magnetic base mount, included with the 10 feet long shielded cable, so you can mount the antenna receiver unit on the roof of your vehicle or at a place with an open 360 degrees view of the sky to ensure the tracking ability of antenna with the satellites in the sky.
The magnetic base mount is water proof, can be mount by itself without any extra fixing, size is about 1.5 inches long and 1 inch in width. Compact, portable and powerful.
Compatible: StreetPilot c320 c330 c340, i2 i3 i5, 2610, 2620, 2650,2660,iQue 3200, 3600, 3600a, M3, M4, M5, and more. Garmin eMap, 60C, 60CS, 76, Map76, 76S, 76C, 76CS, 12xl, 12C, Map12, 40, 175, 195. Lowrance iWay iFinder 100M, H20, PRO, PHd, MapMusic, Hunt e NAVMAN ICN630, ICN620, INC650, 4100, 4400, 4410, 4420, 4460, 4470, 3330, 3450 Holux GM100, 101, 230, 250, 270cf. Or any GPS device with MCX connector.