Rocker Switch (Double-Pole) YSR-821(B)  

Bipolar means that two switches can control one light, and duplex means two switches, that is, a panel has two switches. The difference between single-pole, bipolar, and three-pole switches is first of all a matter of naming. It can also be called Single, double, and triple switches are also called one-on, double-on, and three-on switches. A single is actually a switch with only one button, a double is a switch with two buttons, and so on. 1. The so-called "bit", also known as "connection", refers to several switch function modules on a panel. "One-position" means there is one switch, and "two-position" means there are two switches that can control two electrical devices respectively. 2. The so-called "control" means that one switch selectively controls several circuits. For example, a double-control switch uses the letters a and b to represent a circuit, that is, the process of switching is the process of connecting a and disconnecting b, or connecting b and disconnecting a. Both li…