Id say its more or less the built in wifi on your computer. if you find a plug by your computer and an ethernet cable to connect to it id recommend it for you
Most extenders provide an additional 10-20ft of range from where they are configured. This is in addition to the distance between your wireless router and extender. To get a good consistent signal 150ft away you would need a omni-directional wireless bridge.
The purpose of the extender I bought was to connect the Wi Fi to the surveillance camera receiver through a cat 6 cable. So far is working perfectly. I wouldn’t know about connecting a phone.