To switch off the Halo Collar, position it so that the USB port is facing up. Once in position, press and hold the power button for around 6 seconds, or until you feel three short vibrations. Then, release the button and watch as the Logo LED light lights red for a few seconds before turning off. Take off the dog collar. Turning off the collar will only work while it is in this position unless it is hooked to electricity. In this way, it will prevent your dog from turning off the collar by accident.