Ensures optimal GPS reception for your ONE: Some athermic heat-reflecting windscreens and built-in windscreen heaters block GPS signal reception inside the car. The magnetic, waterproof TomTom ONE External Antenna overcomes this and ensures optimal GPS reception, should you place it inside or outside the car.
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TomTom External Antenna for TomTom One GO 510 710 910 Price Comparison
Price
£13.30