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The price is different for one mall and one mall. Market economy! You'll find out more about it.
You use a ruler to measure the size of the mouth on your toilet, and it should be suitable according to the size.
The bathroom is more humid, you must install a power socket if you want to install a smart toilet, if you have no socket installed in your home, now you can only pull the temporary socket line, which is very unsafe, it is recommended that you must install a formal socket, and add a splash-proof box cover.
The quality of Wrigley is really good, one of the top ten brands, as for the specific model, it is not clear, in short, the brand is very good.
There is no integral smart toilet, you can choose an ordinary model and then a smart cover. For example, AB1218+AKB1000-A