Link2Cell is a cordless phone system that operates together with your cell phone. Simply charge your cell phone through the USB port on the base unit and synch the two via Bluetooth. Now you're ready to make and receive cell calls that are automatically routed through all your home phone handsets. Which means there's no need to carry your cell phone around your home. No convenient electrical outlet for charging your cell phone or smart phone? No problem. The base unit features a convenient USB charging port. And because it's Link2Cell, you can answer your cell phone calls on your Panasonic home phone handsets without draining your cell phone battery.