Welcome to our store!</br> 1、This is an upgraded antenna with a high‑gain antenna of super quality. 2、Suitable for Garmin alpha 100 50 / astro 320 220 430 / alpha100 Handheld GPS. This antenna increases the range you get. 3、Easy to install, the antenna has direct sma connectors for garmin astro/alpha. It connects through a standard sma direct connection connection. 4、Using high‑quality metal materials, durable, can be used for a long time. 5、This is a foldable and extendable antenna with strong and stable signal, which is very convenient to use. <p class="wang-edit-text"><p class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> <p class="wang-edit-text"> Item Type: Telescopic Antenna Material: Metal Folded Size: Approx. 25cm/9.9in Extended Size: Approx. 108cm/42.5in Frequency: 136-174mHz <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x&nbsp;Telescopic Antenna (Customer Satisfaction) - is our priority. If you notice any problems with the products after receiving the goods, such as damaged goods or incorrect quantity, please contact us immediately. We will do our best to provide you with satisfactory after-sale service.</br>