The most luxurious way to wash your hands, touch-free. Fast, precise motion sensor triggers aerating diaphragm pump to deliver just the right amount of rich, creamy pre-lathered foam. To control the amount of soap desired, position your hand up close to the sensor for a little soap and farther away for more. Waterproof for easy cleaning. Refills are easy — just eject the old cartridge and insert a new one. Rechargeable — one charge lasts up to 3 months. Mandarin orange soap sample plus a refillable cartridge included. Pre-filled foam soap cartridges from simplehuman, Antica Farmacista and NEST Fragrances also available.