FMトランスミッタ

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How does the contact time get into my iPod nano?

The sensor sends this information wirelessly to the receiver that is plugged into the iPod nano. The sensor communicates with the receiver via a proprietary low-power 2.4 GHz radio protocol; this is not Bluetooth or Wi-Fi. The Nike + iPod sensor has been engineered and tested to ensure that it does not interfere with Bluetooth, Wi-Fi, cellular, cordless phones, or similar electronic devices.

電池で駆動しているようで、バッテリー寿命は実働1000時間以上で、1日1時間ランニングをしても3年以上は持つ計算らしい。

Is the sensor battery replaceable? How long does it last?

No. The sensor’s battery has a life of over 1000 active hours. The sensor sends a low battery signal when there is around 2 weeks of life remaining (based on usage pattern), indicating that the sensor needs to be replaced.

Most Nike + iPod runners and walkers can just drop the sensor in their Nike+ shoes and forget about it. When inactive, the sensor enters stand-by mode to save battery life.