Automatic infrared sensor. Sensing distance adjustable. 304 stainless steel; LED indicator. Cylindrical design, lock system on top to avoid being misuse. Working for all kinds of clean fluid，such as alcohol, alcohol gel or Liquid sanitizer.Crafted Of Stainless Steel - More durable with the SUS 304 stainless steel. AK1205 will not rust in a humid environment, provide long-lasting strength. Lab test more than 200,000 times without problems. Adjustable Soap Supply - Five level liquid soap supply from 0.5ml to 2.5ml(Different soap may have a slight deviation). Simply set up with the setting button.