... is fire resistant Product Name: K500 Series --- 1-gang large button door bell with switch Specifications: 1) Types: 1 gang to ... 4 gang Wall switch ,Doorbell swtich, Fan speed controller, Dimmer, 20A / ... , 30A,45A 3) Materials: Imported PC, PC, ABS, PC+ABS 4) Easy installation and safety operation, long working life 5) More ...