I have a bunch of Aeotec Z-Wave Smart Switch 6 which have absolutely atrocious signal range, even though mains powered devices are supposed to be repeaters it just didn't work.
Bought this and plugged in in, roughly in the middle of my house and joined it to my network, now all of my Z-Wave devices, ring door sensors etc connect flawlessly.
Other than joining our to your Z-Wave network properly, no other configuration is needed.