Styled to look good in any home the new slimmer shape and smooth lines of the BT1200 phone will help you to keep in-touch with all your friends and family and block a blacklist of 20 of the most persistant nuisance calls . The larger screen makes it easier to use and allows you to see who is calling. Handset and ringer volume control. You must subscribe to a Caller Display service from your network provider to block nuisance calls. Charges may apply. Avoid nuisance and unwanted calls with type 1 call blocking - blocks a specific list of numbers. 1.6; backlit display screen. Telephone information: 50 name and number memories. 5 ringtones. Last number redial. Caller ID. Call log. Call divert. Speaker and ringer volume control. Up to 10 hours talktime/ 100 hours standby. Up to 50m indoor range/300m outdoor range. Out of range indicator. Low battery indicator. 1 - Blocks a specific list of numbers.