This battery-operated spout requires 4 x AA batteries to run (not supplied) and is activated by a sensor on the underside of the unit. A fantastic easy-to-use, flawless hygiene solution. This battery-operated spout requires 4 x AA batteries to run (not supplied) and is activated by a sensor on the underside of the unit. A fantastic... Introducing this innovative sensor tap, equipped with an advanced infrared sensor that activates when hands are placed underneath the spout. As soon as hands are removed from the sensor's range, the water flow automatically stops, providing a seamless and convenient experience. sensor taps offer a fantastic solution for effortless hygiene, ensuring a touch-free operation that minimizes the spread of germs and promotes cleanliness.