To uninstall a Check'In from the Dashboard, select your sensor directly or find it using the search bar. Once you are on the Check'In page, click on the "Settings" tab.
Then scroll down to the bottom of the page until you find the "Danger zone". Click on "Uninstall".
Once the Check'In has been removed from your account, reset it by pressing and holding your finger on the sensor button for approximately 9 seconds. The LED will flash red, indicating that your Check'In is being reset (for Check'In and Check'In Pro models, you will also hear a beep).
Once the LED stops flashing red, remove the batteries from the Check'In to prevent them from being unnecessarily drained.
If you wish, you can now reinstall the sensor in another location.