A single brush head can be used for 6 to 12 months, and this set includes a replacement brush head. The number of bristles has increased from 768 in the previous generation to 1908, designed to enhance teeth cleaning and gum massage. An additional brush head is included for added convenience. Four cleaning modes are available with one-touch operation: A. Clean mode for thorough brushing B. Soft mode for comfortable brushing C. Gum care mode for gentle gum massage D. Whitening mode to help remove surface stains The U-shaped design fits comfortably over your teeth. Simply bite down gently and move the brush back and forth to achieve a 360-degree clean. Utilizing vibration technology, it provides a comprehensive clean without the need for manual brushing motions. This electric toothbrush allows for efficient morning routines, offering hands-free convenience during use, especially in whitening mode. It enables multitasking, such as getting dressed or applying makeup, while maintaining effective oral care.