EX6200 Wireless Extender connection options

I’m pretty sure that the extender can connect to the router via an ethernet cable but can’t currently double check this.

The actions of client devices when moving around the house are set at the client devices themselves. Typically there will be a setting in the devices Advanced Properties called something like ‘Roaming Aggressiveness’ which will change how easily the device changes from one AP to another, there are plenty of Internet pages describing that function if you have a search.