Built-in products are robust and versatile, in addition to providing greater hygiene and safety; Set with fully built-in installation: the connection between the valve and the urinal is not visible, which provides greater resistance against vandalism and greater ease of cleaning. The water flow is automatically activated after the sensor detects that the user has left the sensor field, and closes in approximately 4 seconds. In addition, our sensor has a technology that releases 1 small flow of water every 12 hours of non-use, to prevent the return of odors. As it is a DocolTronic product: It works with 4 AA batteries, which guarantee the use of the product regardless of any power outage.