Ensure that there is no water tank (recommended), so that the water quality is cleaner and will not breed bacteria. Most of them are regenerative, which is easy to breed a large number of bacteria and consumes electricity, so the service life is not high (not recommended).
There are many heating elements inside the smart toilet cover. It is recommended to buy a toilet cover made of flame retardant material to avoid the fire incident of the smart toilet cover.
In order to better match your own toilet, it is recommended to choose an ultra-thin smart toilet cover (the world's thinnest smart toilet cover-Ren Jie smart toilet cover, the body thickness is only 95mm).
I hope my point of view is useful to you.