This portable sink set up has a touch-less motion sensor tap. The 120v Ecosmart instantaneous hot water tank heats the water to comfortable hand washing temps and waste water is stored in the built in reservoir until it needs to be emptied. Water is pumped at 40psi by a self priming 120v pump that is activated by pressure drop. These sinks are very high quality and very low maintenance. They are hot water on demand and very easy to move. Perfect for any place that needs sinks for Covid-19 compliance and does not have easy access to hand washing or a source of hot water. Please message for any further questions.