This is a BABYBJÖRN toilet seat. I used it for about six months. You just need to turn the dial on the back to fit the shape of the toilet seat, and then just place it on the toilet. I had it leaning against the side of the toilet, and my child would put it on the toilet and put it away by themselves. Even when I tried to help, they would say, "I can do it!" and I was so touched. It has been soaked in bleach, cleaned, and disinfected. Please check the condition in the photos. As this is a toilet item, please refrain from purchasing if you are sensitive. - Brand: BABYBJÖRN - Color: White - Product Name: Toilet Training Seat - Target Age: 2 years and up - Features: With handles Thank you for looking.