For example, a lamp needs only one switch to control, and we can choose a single control switch, but sometimes for convenience, such as a lamp in a bedroom, we hope to open it at the door of the bedroom with a switch to turn it off at the bedside , So that the bedroom door and bedside switch to use dual control switch, in short, the single control is a switch to control a lamp, dual control is the two switches can control the same lamp. Dual control can replace the use of single-control switch, but a single control can not replace the dual control.
1. The appearance of the difference: single control switch only two terminals, dual control switch has three terminals.
2. Usage Difference: Single-control switch refers to a switch to control a lamp, double-control switch refers to the control of the same lamp in two different places, such as the living room, stairs and other locations, so we do not have to Turn off the lights (door), dark back bedroom, very convenient.
3. Dual control switch can be used as a single control switch, a single control switch can not do double control switch Dual control switch is now common.
4. Usage Difference: Single-control switch refers to a switch control a lamp, double-control switch refers to the control of the same lamp in two different places, such as the living room, stairs and other locations, so we do not have to Turn off the lights (door), touch the bedroom back to black, very convenient.
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