To save energy, your hum brush automatically goes into sleep mode after you finish brushing.
hum smart toothbrush uses advanced technology to uses as little power as possible while keeping Bluetooth active.
If you plan to stop using your hum toothbrush for an extended period, we recommend that you remove the batteries, clean the toothbrush handle and head and store in a cool, dark place.
When you start using the brush again after an extended period of time, replace the batteries by firmly holding the bottom of the handle while rotating the top counter-clockwise, insert 2 new AAA batteries as indicated inside the brush handle and firmly rotate clockwise back into position to close. Reunited at last!