The JUMBO Talking Caller ID SEE Who is Calling --- HEAR Who is Calling NOW WITH CALL BLOCKING - NO MORE SPAM CALLS! - Big Display see who is calling - Talking Caller ID Name and Number hear who is calling - Recordable Name customize the caller name - Can Block all calls and White List 50 numbers - AC Power Adapter Included - Extra Jack and Cord for Telephone in the back of unit don?t waste a phone jack - Battery backup you can still use the unit if the power goes out for 3-4 days 4 X AAA - Programming saved forever no worries about losing programming if power goes out even without batteries - ALL PHONES BLOCKED blocking function controlling all the phones on that line without them changing any wiring in the house it will control any phone that is in parallel on that line - 2 display languages, English, Spanish - Support of 99 groups of called numbers. Phone Numbers can be found and can be called back - 3 3/4? inches by 2? inches LCD BIG LCD display What's Included: Talking Caller ID Unit Power Cord Wall Plug Short Phone Cord (used between your telephone and Caller ID Unit) User Guide Features: Caller ID Functions? Support call back function for incoming numbers in U.S. Deletion for Incoming call records and full deletion function; Reviewing incoming calls records, quick review function; 99 groups of incoming calls; 50 groups of white-list numbers, recording for the name in the white-list. Talking the name or numbers when the calls come in. icon Indications on the LCD for new incoming calls, Voice mail, Low Battery, AM-PM, RPT, and VIP. Call Blocking (Block Spam Calls) Stop numbers from calling you again. Plays message to caller that their number is blocked and they should not call again. Back light Function? 8 seconds back light for ringing, keys operation, and phone pick up & hang up. The back light will turn off after 8 seconds if no more operation is done. You can also turn the back light on or off. Clock System? 12-hour real-time clock display and setting function, month and day format. (Not year) LCD Contrast? 5 Levels of contrast settings, 4th level set as default. Talking the numbers when white-list call comes in. The white-list calls with name recording can talk the names 0-5 times, if someone sets it to ?0? the speaker will keep silence and will not say any names or numbers until it is set back to 1-5. Calls not in the white-list will only talk the numbers if the block function is OFF. Language settings: Selective display English and Spanish. Power Supply: (Included) 120 and 240v, uses USB cord to connect to Caller ID unit for flexible charging options.