Troubles setting up wifi

At my gfs place they have the router on the 1st floor and the wifi signal on the 2nd floor is really bad. At the local tech store they gave me some kind of a router you just plug into electricity and it repeats the signal, i dont really understand it.

However, idk how to set it up. Om the box it says i have to press some kind of a button simultaneosly on the main router and on the repating one. However, I can't find this button on the router, therefore i don't know how to set up the router.

Any help would be appreciated. Greetings.

EDIT:

Repeater model: D-Link N300 Wi-Fi Range extender

Router model: Tilgin AB Vood 342

Submitted March 30, 2018 at 08:15PM by AJHEAT https://ift.tt/2E7yb0J