white switch - double simple or two-way black toggle & double push-button switch

A. The toggle switch can be installed on a two-way or simple circuit.

What is a two-way switch?

Two-way toggle switch, providing control of a light from two locations.
A two-way circuit is an electrical circuit that allows a lamp to be switched on or off from two switches, for example, a switch at each end of a corridor for the same lighting point.

What is a simple switch?

The simple switch, on the other hand, is used to switch a light on or off from a single location in the room (usually at the entrance to the room). 

B. Push-button
A push-button is not a normal switch. The electric current is only transmitted when the button is pressed (for example a doorbell). But if a push-button is used in combination with an impulse relay in the fuse box, then it can be used as a one-way switch, a two-way switch, a timer or a stairwell switch. And if a push-button is used in combination with home automation then it can be used as a one-way switch, a two-way switch or a stairwell switch, a dimmer, a shutter switch, a doorbell button, a master switch, etc. 

General characteristics push-button: 

- Compatible with Ø 7 cm flush-mounted boxes. 
- Compatible with stairwell impulse relays. 
- Compatible with home automation. 
- Compatible with a timer.

* Lacquered steel wall plate.
* Brass, nickel-plated brass or black brass toggles and/or pushbuttons.
* Sold with flush-mounting box (70mm x 140mm).
* Complies with the NF EN 61058-1 standard and is VDE certified.