The MFJ-1640T is a multi-directional mobile antenna designed for HF bands. This 40-meter HF hamstick style antenna is compatible with mobile/in-vehicle radio communication, and has an omni-directional directivity. With the MFJ-1640T, you'll be able to operate your radio in a variety of locations with ease. It's easy to install and is designed to work with a wide range of brands including universal brands. Make sure you get the best performance out of your radio communication with the MFJ-1640T!