The number of charging handles of an electric toothbrush refers to how many handles can be connected to one main toothbrush. This feature can be useful for families or couples who want to use one main toothbrush and have their own toothbrush handle for each. This allows each user to use their own brush for optimal hygiene and convenience. This ensures that everyone has their own space and the ability to choose the settings and cleaning mode of their preference. This feature also makes it easy to share the main brush in the household and saves the cost of purchasing additional complete brushes.