Description:Charging - environmental protection: environmental protection. Easy to charge, when the battery is low, it will emit 3 beeps to indicate that it needs to be charged; The indicator remains on when charging; After fully charged, the indicator light will go out automatically. Lovely design: unique duck design hands-free dispenser, infrared control, non-contact, more aured. Help guide children to develop the habit of washing hands frequently. As long as they stretch out their hands, foam will be delicate, rich, convenient and fast. The lovely appearance also adds a lovely taste to your bathroom. This product is applicable to schools, hospitals, hotels, kindergartens and families. IPX4 waterproof: This kitchen and bathroom soap dispenser is waterproof, and the body is splash proof. There is no need to worry about directly contacting the bacteria on the hand soap pump, because the automatic soap dispenser is non-contact. Usage: 400ml water tank supports various types of soap, which can produce foam. It needs to be diluted in a ratio of 1:4 (original solution 1: water 4, or special foam soap solution without water. Please do not add any solid or granular cleaning products to the bottle.