The quality is very poor, and the control panel will get ants during the warranty period. Take them to repair. Supor said after the sale that it was not a quality problem, and asked me to pay 30 yuan to call Supor manufacturers. The manufacturer replied after the sale that he would not pay for it, and then said that many consumers complained about the price reduction 10 yuan, charging 20 yuan. I asked the after-sales service point to issue an invoice and replied that there was only a receipt now. I have to pick it up tomorrow after the invoice is issued. I said I would pick it up tomorrow, and he said the invoice can only be issued in the name of the company! It was indeed Supor who called the manufacturer. After-sales invoices are not open! I have experienced it personally, so we should be careful when buying electrical appliances!