This quick connect 4 piece kit. A got-to-have for every hound hunter who is constantly in and out of his vehicle. Each kit has a base which works on Garmin's 220, 320 and Alpha 100 GPS handheld and 3 antenna connectors that will adapt any Garmin antenna (roof mount or handheld) that you already have. We also offer a wide range of additional antennas that work with this kit.