auto flush

1910 Auto flush toilet. It's a frost free toilet. You sit on the seat to get it to fill the tank (has a bladder) then soon as you get up it flushes like its a jet engine. The valve is 3' in the ground. Does anyone know more about these?

MW6463056CUMFG TOTO Aquia IV with Washlet Pictures and Reviews This Aquia IV is a dual flush with the 1G option for the 1.28GPF option. Pictured below is the One gallon version dual flush, and also added is the autoflush and the Polished Nickel push buttons. The toilet comes with the standard...