This is a great device. This particular unit is new in package. The Cell Fusion series lets you pair your Bluetooth-enabled cellphone to your house phone, but allows you to switch back and forth from your cell to your landline. The caller ID feature will also point out whether an incoming call is for you cell or your home phone. The GE phone will also allow you to choose either your landline or cellphone when making outgoing calls to take advantage of your unlimited night and weekend minutes.