This article explains how you can use the iReader Locate Me feature to locate your misplaced iPad.
If you tend to leave your iPad under a cushion or in a conference room, chances are you won’t remember where you left it. If you happen to have an iReader, you can use the Locate Me feature on the device to help you find your iPad. The Locate Me feature on your iReader is especially smart - it tracks your iPad even when your iPad’s battery is when its battery is critically low. Even if your iPad runs out of power, your iReader’s Locate Me feature can find it.