"Good to know- The 1.8"" backlit display makes it easy to view the phonebook, call logs and other functions- Use the 30-entry phonebook to save your most important numbers - no need to dial them manually- Away from home? The answering machine can store up to 15 minutes of messages- Its Caller ID feature lets you save up to 20 contacts, so you'll see who's calling you on the screen- With the volume booster function, you can set the volume level as needed for better clarity- No spams, no scams - with the call blocker you can avoid nuisance calls and block up to 30 numbers__________Please note: 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."