Here is the product link:
https://www.tidohome.com/products/por...

【Hand-Free Operation】Without manual operation, this hand sink is convenient to use. By stepping on the foot bump once, 6 oz(180 ml) water will be pumped out continuously. 7.9 gal(30 L) freshwater tank provides more than 180 washes by a single fill-up.
【Perfect for Personal Hygiene】 A 0.8 gal(3 L) liquid soap dispenser is equipped, which can be used for a long time. These sweet designs allow you to keep hygienic and enjoy the same comfort as at home even when you are outdoors.
【Portable Design with Wheels】Thanks to its 12 lbs lightweight and two wheels at the bottom, it’s effortless to carry and move anywhere. Portable design is perfect for both indoors and outdoors.
【Multiple Methods of Use】The hand sink can be used alone if you don’t have that much storage space when traveling. You can also use it in combination with the sewage tank to collect used water for environmental protection or connect the drain pipe to an outdoor toilet for water reuse.
【Durable Material & Easy Assembly】Made of premium HDPE, this hand sink is firm and has good wear resistance that makes it very durable. We provide a detailed picture and text instruction so that you can assemble it quickly with no tools.