This automatic soap dispenser has built-in precise infrared motion and PIR sensor detection technology. The high-efficiency pump only needs 2 seconds to dispense soap, 1 ml each time. If you need more, please hold it under the sensor and wait for 2 seconds This kitchen soap dispenser can hold 400 ml of liquid soap, and the visible scale of the soap tells you when to add the soap liquid. Non-contact soap dispensers can be used in kitchens, bathrooms, hotels, hospitals, and are compatible with most liquids The automatic soap dispenser requires 4 AAA batteries(not included). When installing, please confirm the "+" and "-" signs of the battery and soap dispenser for correct installation. You can use rechargeable batteries with this product The non-contact soap dispenser adopts IP67 waterproof design, and the whole machine can be cleaned, which helps prevent the battery box from being immersed in water and causing . The bottom adopts non-slip design, strong sealing Note: When using for the first time, you need to sense the non-contact soap dispenser 2-3 times to pour the soap into the straw; it is compatible with all kinds of conventional dish soap, liquid hand or , and the nozzle not produce gums