Simplehuman s sensor pump is the most efficient way to wash your hands — no germs or smudges left behind. It has a clog-proof tubing pump that 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. A funnel refill opening makes refills fast and easy and it s waterproof for easy cleaning. It recharges with the included charging puck — one charge lasts up to 3 months. Use simplehuman soap for optimum pump performance.