This is a regular well known corded phone. The handset is connected to the base with a cord. With this phone you can only talk close to it holding in your hands the handset. This is a cordless phone. The handset does not have a cord connecting it to the base.
Cordless phones are great for use around the house without being tied to a single place. If you have a landline, a cordless phone is a real convenience that is easily taken for granted. Some cordless phones pair with your smartphone and pull double duty. You can leave your smartphone in a place that gets a good signal and still take calls.
If you want to buy a cordless phone from a manufacturer that seems to know where things are headed, look no further than Panasonic. The KX-TGE475S is a cordless phone system that doesn't even require a landline to use. It's a five-handset system that can connect to your smartphone via Bluetooth and transmits phone calls from your smartphone.