Types and characteristics of household lighting switches:
1. Voice switch.
2. A few openings and several controls:
Several open: Indicates that there are several keys on a panel.

Single control: ordinary key switch.

Single control switch:
Single-control switches are the most common in home circuits, that is, a switch controls one or more electrical appliances. According to the number of connected electrical appliances, it can be divided into single-control single-connection, single-control double-connection, single-control triple-connection, and single-controller. Quadruple and other forms. For example, a single-control single-connection switch is used in the kitchen, and one switch controls a group of lighting; three spotlights may be installed in the living room, then a single-control triple-connection switch can be used to control.

Dual control:
A dual-way switch can control a light together with another dual-way switch. Turn on the lights when you enter the house, and turn off the lights when you go back to the bedroom.
Dual control switch:

Dual control switches are also common in home circuits, that is, two switches control one or more electrical appliances at the same time. The proper use of dual switches will bring a lot of convenience to home life. For example, the lighting in the bedroom can generally be controlled by installing a switch beside the door, and then connecting a switch on the head of the bed to control the ceiling light at the same time. You can use the switch directly on the bedside, which is very convenient, especially when it is cold in winter.

A two-way reversing switch:
Also known as midway switch, three-way switch, multi-control switch. It can be installed in the middle of two dual-control switches, and the three switches control a light together.