simplehuman 8 oz. Sensor Pump with Soap Sample, Brushed Nickel Touch-free automatic soap dispenser Rechargeable - one charge lasts up to 4 months Innovative silicone valve prevents messy drips Instant, accurate dispensing Adjustable volume control buttons No-drip valve: Silicone valve creates a seal - preventing messy drips Precise sensing - The sensor has a precise trigger zone for accurate, high-speed activation Recharges with an included USB cord - hassle-free and eco-friendly (one charge lasts up to 4 months) The unique gear design in our high-efficiency pump is engineered to dispense soap consistently and quickly -- in just 0.2 seconds Volume control: Easy-access control buttons allows for instant volume adjustment Wide opening for easy refills