... resistant Product Name: K500 Series --- 1-gang large button door bell with switch Specifications: 1) Types: 1 gang to 4 gang Wall ... neno, south and light control /touch time delay switch, 2 pin socket, 3 Square pin / 3 round pin socket, ... can be choosen , We can supply many different kinds of switch and sockets, such as European style, British style, US style ...