360 PROFESSIONAL DENTAL CARE - F5530 provides complete teeth surface cleaning by sonic toothbrush and interdental cleaning by water flosser. MULTIFUNCTIONSL KNOB - Press the konb to change flossing mode. Spin the knob to change 10 levels of water pressure. It is designed with anti-slip surface. FLOSSING MODES - 2 flossing mode with 10 levels water pressure and massage. BRUSHING MODES - 4 brushing modes. (Clean, Soft, Whiten, Massage) POWER - Water flosser is powered by AC/DC power cord, and sonic tootbursh uses built-in rechargeable battery. REPLACEMENTS BRUSH HEAD AND NOZZLES- There are 2 brush heads, 2 nozzles and 1 tongue scraper in the pakcage box, and you can buy more brush heads and nozzles to make it more professional and attractive.