This product requires the installation of 4 No. 5 batteries before installation. The batteries need to be purchased separately by the customer and are not included in the product. Main features: Inductive liquid extraction: Using infrared sensing technology, the liquid is automatically extracted when the hand approaches, without the need for touch, to avoid cross infection. Intelligent electric: Built in motor drive, precise liquid output, avoiding waste. Wall mounted design: can be installed on the wall, saving space and suitable for various scenarios. Applicable to various liquids: it can be used for hand sanitizer, disinfectant, foam hand sanitizer, etc. Large capacity design: usually equipped with large capacity liquid storage bottles to reduce the trouble of frequent liquid addition. Waterproof design: suitable for use in damp environments such as bathrooms and kitchens. Applicable scenarios: Family: Convenient for daily hand washing, especially suitable for families with children or the elderly. Public places such as shopping malls, hotels, restaurants, etc., to improve hygiene standards. Medical institutions: Reduce