The place your hands under the spout, and a sensor turns on the motor, dispensing a precise amount of soap or lotion. This compact pump holds 8 ozs. of soap or lotion and lets you set the soap volume for each use, and gives you a button to manually dispense soap if you desire. The wide opening on the soap container aids in spill-free filling, a LED on the spout lights up green when the sensor is activated and red when batteries are running low. 4 AA batteries (not included) will power the dispenser for up to a year. 2-year warranty.