The Gigaset A705 Trio has 3 handsets, so you have a phone on hand on every floor. As a result, you never have to run down the stairs when the phone rings again. You can add up to 100 contacts to the contact list on the phone. When one of those contacts calls you, you'll see who's calling right away thanks to the caller ID. With the backlit keys, you can also see which number you press in the dark. The phone has a hands-free function, so you can keep your hands free when you're making a call. This phone doesn't support VoIP, so it's not possible to make calls via the internet.