Is this the version that has the zwave repeater?
I am not aware of any Wemo device that has a zwave repeater in it. They are Wi-Fi only.
I think you may be confusing with the Lowes Iris Plug (zigbee with z-wave repeater)
I’m pretty sure the WeMo is WiFi only. No Z-Wave.
If you want a plug with a Z-Wave repeater, check out the Iris Smart Plug.
It’s a ZigBee plug with a Z-Wave repeater. This has the benefit of increasing both your Z-Wave and ZigBee mesh networks.
Another option is the Aeotec SmartSwitch or SmartDimmer6.