Philips Sonicare Pro Results HX6014/87, 4-pack, Standard, BrushSync. Includes 2 Philips Sonicare toothbrush heads. Sonicare Fluid Action technology provides 62,000 brush strokes per minute. Effectively removes plaque, offering deep cleaning. BrushSync technology monitors head usage and alerts you when it's time for replacement. Ensures optimal brushing performance, removing up to 70% more plaque compared to a manual toothbrush.