Call blocking stops nuisance numbers disturbing you. Triple handsets can be placed throughout your home. Caller ID shows you who is phoning. Block up to 20 different phone numbers with the call blocking feature. With three individual handsets complete with their own charging stations, you can place the handsets around your home in convenient spots. Know who is calling you with the Caller ID feature. Save up to 50 contacts and they will be displayed on the screen when they ring, and if they are not saved you will get the full number instead. You must subscribe to a Caller Display service from your network provider for the nuisance call block and caller display features to work. Charges may apply.