From the Manufacturer
The TomTom External Antenna for GO 300 and 700 Navigators ensures you receive optimal GPS reception for your TomTom GO 300 or 700 navigator. While many athermic heat-reflecting windshields and built-in windshield heaters block or reduce GPS signal reception inside your car, the waterproof TomTom External Antenna overcomes this to make sure you get the best possible GPS reception. This unit comes with a magnetic GPS antenna with plenty of connecting cable, making it a snap to quickly place inside or outside your car, without requiring any difficult or permanent installation. The external antenna simply plugs in to the included, special external antenna docking shoe, and you just dock your TomTom GO, and are ready to go.
What's in the Box
External antenna with lead, external antenna docking shoe with lead, product installation guide and warranty leaflet.
Product Description
This GPS antenna will work w/the TOM TOM models: 300, 500 & 700. Some windsheilds block GPS signals from reaching the TOM TOM GPS receiver. This antenna can help solve this issue either by placing it inside or outside the vehicle. 1D00-008, PART#: 5D00.116