Inside the Doggie Dooley the fast acting chemicals break the waste down which means never having to take out smelly trash bags again. Doggie Dooley utilizes the enzyme and bacteria action reducing dog waste to a ground absorbing liquid. Septic Tank Style (waste is treated in the tank, then overflows). Made of rust proof plastic. Foot operated lid opener comes completely assembled. Includes a 6 month supply of Digester Powder which works well in all soil conditions except hard clay and heavy sand. For 1 large dog or up to 2 small dogs.