This is a high-quality magnetic antenna that is compatible with NGVA1 / NGVA3 UNITS and FX387 models. It works perfectly with Sirius and XM transmissions and is designed for use with vehicles. It is ideal for anyone looking to upgrade their car's radio antenna to receive better satellite radio signal. The antenna is made by GETWIREDUSA and is brand new, so you can be sure that it will work perfectly. If you are looking to improve your car's radio antenna, this is the perfect product for you.