BTMini Connector Kit - 1GB SINGLE Powerline Plug ideal for online gaming, streaming UltraHD, UHD, 4K, 3D and HD

Will this connect to a BT mini hub kit. I am looking to add extender but do not know if i need an identical to the one that came in the kit.

Does this item boost your wifi when plugged away from the router

Does this work with non bt router or is it strictly only for use with bt

Can this be used to add an extra to a twin powerline kit of two?