my current phone worked well for 50 plus feet it has its own base and you can hook up even more head sets,. basically its all on the frequency the more rare your frequency from what i understand the further i lived in between tall apartments and lots of trees granted i was on the 3rd floor it worked good its a GE 2.4 ghz hope that helps i see best buy does not sell this one but there are some comparable ones like this one that lets you link up your cell phones via Bluetooth Panasonic - Link2Cell DECT 6.0 Plus Expandable Cordless Phone System with Digital Answering System