simplehuman 8 oz. Sensor Pump with Soap Sample, Black Touch-free / automatic High-efficiency pump with consistent soap dispense Volume control: easy-to-use buttons control how much soap or lotion to dispense Touch-free automatic soap dispenser Innovative silicone valve prevents messy drips Instant, accurate dispensing Adjustable volume control buttons Wide opening for easy refills Lasts up to 1 year with 4 alkaline AA batteries (not included)