A single brush head can last 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 improve cleaning and gum massage. An additional brush head is included for enhanced performance. This U-shaped electric toothbrush features four one-touch modes: A. Clean mode for thorough brushing B. Soft mode for gentle cleaning C. Gum care mode for gum massage D. Whitening mode for surface stain removal Simply place the brush in your mouth, gently bite down, and move it side to side to achieve a 360-degree clean. The built-in vibrations help clean teeth effectively and comfortably. The hands-free design allows you to multitask while brushing. The blue light technology supports the whitening mode, helping enhance the appearance of your smile. This toothbrush is designed to make your daily routine more efficient and convenient.