Easy to Install and Use: 4 pcs AAA battery(Without Battery) is required for this dispenser. Don't need to install , just put it on the flat where you want, for example place on the restroom and kitchen sink counter-tops, place on the bathroom shelf etc. Also can be filled with and put on the and school tables etc. Waterproof & Streamlined Body: This touch-less soap dispenser with IPx6 waterproof design of the whole body, it is washable. The bottom adopts anti-slip design, streamlined body is beautiful and stylish. Sensor Soap Dispenser:Compared with other hand soap dispensers, automatic soap dispenser uses Precise infrared sensing technology to provide you with a non-contact experience, which gives you the touchless experience and dispense soap consistently and quickly within just 0.26 seconds. Big Capacity & Multiple Use: 14oz (400ml) capacity makes it the perfect touchless liquid dispenser, can be filled with hand soap, body washing liquid, shampoo, dish washing liquid, laundry detergent liquid and etc variety liquid. Please NOTE In the first use, the sensor soap dispenser needs to be sensed 2-3 times to allow the straw to fill with soap (NOT for gel) ; When installing the battery, please check "+" and "-".