After putting in the battery, hold the iFertracker in your hand until the LED indicator blinks once a second. (The first time you use it, you will need to connect the iFertracker with the app on your mobile device to sync the time). If the battery has enough power, you don’t need to connect with the app beforehand except the first time; you can simply wear it, and the iFertracker will automatically turn on. After removing it in the morning, put the iFertracker aside at room temperature. When the device senses the drop in temperature, it will turn itself off automatically.

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