This auto soap dispenser built-in accurate infrared sensor, you just need to put your hands under the infrared sensor, it will dispense foam within 0.5 seconds automatically, needn’t press the button,touch-less will more healthy and convenient for your life. New version auto hand soap dispenser just need one button, press the button the dispenser will turn on, just put your hand under the sensor, it will dispense foam automatically. So easy to use and wash, doesn't waste soap and water, doesn't affect the use in the sun. Not have complex instruction and install steps, you just insert 3 AA battery, pour foam soap or foam hand sanitizer. small volume takes up very little space, easy to use, you can move it anywhere when you need, good for bathroom and kitchen. Water-proof,moisture-proof and leak-proof, effective to prevent corrosion and avoid getting soaked in water cause this dispenser fail to operate, will make the foam dispenser more durable and extend the useful life.