Quad Stream technology for faster more effective flossing X-shaped water streams cover more surface area for a faster, deeper clean versus manual floss. Effortlessly. Pulse Wave technology guides from tooth to tooth Gentle pulses of water guide you from tooth-to-tooth so that you don't miss a spot. Whisper quiet for great results without disturbing others Engineered for a discreet clean, so you get great results without disturbing others. 2 flossing modes, 10 intensities Enjoy a clean that's tailored to your needs. The clean mode uses a continuous flow of water for a great everyday clean, while Deep Clean uses distinct pulses for a more thorough clean. Whenever you need, adjust the intensity to your ideal comfort level. Standard nozzle for a regular clean Use the standard nozzle for a regular clean. It uses a single stream of water to remove debris and clean thoroughly between your teeth. Quad Stream nozzle for maximum coverage For maximum coverage and an extra thorough clean, use the Quad-Stream nozzle to concentrate water into four wide streams between teeth and along the gum line. The soft rubber guide is gentle on gums and every nozzle simply clicks on and off. Easy to fill 550ml reservoir The 550ml reservoir holds enough water for one cleaning. To refill simply lift out, fill and click back in.