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.
* Levers and push-buttons available in brass, nickel-plated brass or black brass finish.
* Supplied with flush-mounting box (70mm x 140mm).
* Complies with NF EN 61058-1 and VDE-certified.

This switch can easily be installed either horizontally (diagrams a and b) or vertically (diagrams c and d), as shown in the technical drawing. The switch will be delivered assembled as in diagram a.
If you wish to change this arrangement, simply unclip the two inner plates that hold the mechanisms before installation, reposition them as in the desired diagram (b, c or d), and clip them back in.
Please note, however, that for switches installed vertically, the levers will remain oriented horizontally due to the configuration of the cover plate.