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TomTom GPS watches use Bluetooth® Smart to connect to sensors. Bluetooth® Smart is a version of Bluetooth® which is designed for connecting small, simple sensors to smartphones and computers.
We have tested TomTom GPS watches with the following heart rate monitors:
We have tested TomTom GPS watches with the following cadence sensors:
However, you should be able to use any Bluetooth® Smart heart rate monitor with your watch*. You should be able to use any Bluetooth® Smart speed and cadence sensor with your watch.
Note: The Polar Wearlink Transmitter Nike heart rate monitor that works with the Nike+ SportWatch GPS is not compatible with TomTom GPS watches.
* TheTomTom Heart Rate Monitor does not work under water.