Xtenzi Active GPS antenna For SONY VCA-43 VCA43 GT21-1S XNV660BT XNV770BT XA-NV300T XANV100T Xtenzi Active GPS antenna XT91864 for Sony Radio Navigation select models. Xtenzi GPS antenna Ensures optimal GPS reception for your Sony NAV system, Some heat-reflecting windshields and built-in windshield heaters block GPS signal reception inside the car. The magnetic, waterproof External Antenna overcomes this and ensures optimal GPS reception, You can place it inside or outside the car. Premium Quality GPS antenna will work as replacement part For: VCA-43 GT21-1S, 9408-421-406-88, Compatibility for XA-NV100T, XN-V660BT, XN-V770BT, XANV100T, XNV660BT, XNV770BT