This antenna is small but works like a charm! It is 2.5″ long from base to tip. It comes in both SMA or BNC. The BNC is quick connect antenna that requires our quick connects in order to work with your handheld. The SMA just screws directly onto your handheld no adapters needed. It is a really great, compact antenna that is a good addition to any system. Works with the Alpha 100, Astro 430, Astro 320 and Astro 220.