ZTCOO Battery Powered Wall-Mount 500ML Automatic Hand Soap Dispenser Touch-free Kitchen Soap Lotion Senor Pump (D9031-110*95*165mm) For home kitchens, bathrooms, offices, kindergartens, schools, airports, and hotels and other public places. Operated by Wall-mounted roof and dark button, easy to install and safe to use. Single out the liquid 1ml, avoid unnecessary waste Auto-sensing, free access, to prevent cross-infection.Auto-sensing, free access, to prevent cross-infection. Battery powered: 4*01.5V AA batteries(batteries not include), can work 20,000 times.