I have an OptiCover AC1200 WiFi Range Extender. I also have the WPS on my router.

Press the WPS button on your host router, then press the WPS button on the extender within 2 minutes.

Wait until the Signal LED changes to solid blue, which indicates that the WPS connection is successful.

It's done and the WI-FI repeater will automatically find the signal.

Enjoy. Both extended networks share the same SSIDs (network names) and passwords as those of your host networks.

It looks like Victony has changed it's name to Wavelink:
USER MANUAL WAVLINK AC1200 WL-WN575A3 WL-WN575A2 - YouTube
WN575A3 AERIAL D4 - AC1200 Dual-band Wireless AP/Range Extender/Router - Wavlink

Try this:

Settings for OptiCover WiFi Extender

then try this AMAZON Video!

OPTICOVER WIFI EXTENDER 1200 MB HOW TO SETUP

Anthony!

login to the router main interfacew normally by 192.168.0.1 the user and password are on a sticker on router somewhere and then there will be a tab in interface that will say Wireless the pass word can be changed via there. another alternative is if the router has WPS just press button on rpouter and on device find WPS connect in wifi settings and it will auto connect.

Try unplugging BOTH the repeater and the router, Then, plug the router back in and let it establish a connection. Then, plug the repeater in and let it reestablish the connection.

talk to Dlink directly. (no main router stated, model?)
it is just a RANGE extender,
7 different modes
Access Point,
Wireless Client,
Bridge, Bridge with AP, Repeater, WISP Client Router or WISP Repeater
Compatible with 802.11b and 802.11g Devices(no main told) .
repeater mode (1 of 7) is covered in the manual
and wirlessly bridges to the main AP, and extends the range of the wifi to the new zone,(goal?)
( do this here but use Ethernet from main to new AP) vastly better.
page 26 in your manual covers setup for Repeater mode.
did you do that?
step one is the SSID, use a new name here, not same as other AP or other wireless nodes, ok?
step 2, select repeater
I never use WPS so I skip this (its insecure)
pick manual
page 29 find our main router, SSID name, or survey it.
this is very important to marry the new AP to the old router SSID.
my main would be WPA2, id not use any others (security)
then type in the mains , Password, 8 to 32 chars.
its done.

update the firmware in both routers first? be wise that.
I never do this ,all it does is slow down wifi in 2nd zone.
for sure walls present ! in the line of site paths.
I bridge them with ethernet (wired) now both zone go full speed.

Log in to router via browser at: 192.168.1.1
At login and password promt enter
login: admin
password: admin

Navigate from left pane: Advanced setup -> LAN
Enter there you'r new ip: 192.168.2.1
Subnet mask: 255.255.255.0

Save

There's quite a bit to know about extending / repeating WIFI signals.

Read about extending a WIFI signal with a Sitecom WL-130 repeater here.