The PetPace collar records and processes data while it is on the pet. If you remove the collar, there will be gaps in the data, which may make the analysis and following of averages and trends less accurate. If you do feel the need to remove it, please place it on the charger or turn the collar OFF. To turn the collar OFF, simply hold the black button down until you see two green LED blinks and continue to hold until you see two red LED blinks. To turn on, follow the same steps, but release the black button after the two green LED blinks.