Nike + IPOD - Manual (Page 7)

Step 3: Insert the Nike + iPod Sensor in your Nike+ ready shoe.
Lift the insole of the left shoe, remove the foam insert from the pocket underneath, m
and replace it with the sensor.
Lift the insole and place the
sensor in the pocket, flat side up.
You can leave the sensor in your shoe when you aren’t working out, but if you plan to
wear your shoes for a long time without working out, we recommend replacing the
sensor with the foam insert to save battery life.
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