Most efficient way to wash your hands — no germs or smudges left behind. Clog-proof tubing pump ensures a precise and consistent flow, and the silicone valve prevents messy drips. To control the amount of soap desired, you can position your hand up close to the sensor for a little soap and farther away for more. Funnel refill opening makes refills fast and easy, and it's waterproof for easy cleaning. Rechargeable with included charging puck — one charge lasts up to 3 months.Use simplehuman soap for optimum pump performance.