Abeast Telephone Call Blocker the Latest Version 5.0, Black, Block Robocalls, Telemarketers, Nuisance, Charities, Politicans, Unknown, Private, Out-of-area, Solicitors, Junk Faxes, Scammers 1. This is the only high capacity call blocker available in the market with an LCD display that allows you to block (or blacklist), review and remove up to 1,500 phone numbers at any time.T-Lock / Pro Call Blocker. Block unwanted calls. Stops nuisance callers, potential phone frauds & scams. You can take total control of your incoming calls by manually blacklisting unwanted callers for good. 2.Blacklist 1500 incoming call records by phone number. Block up to 10 incoming area codes. Store/review last 100 incoming call records (add to BLACKLIST when desired). Store/review last 100 outgoing call records (add numbers to BLACKLIST when desired). Block outgoing calls by number prefix (also up to 1,500 call records). Non-volatile memory saves stored data when disconnected from the phoneline. 3. Easy to Setup & Use -- Simply press a button to BLACKLIST numbers forever! Turn ON & OFF feature to Block calls with no caller ID (shown as UNKNOWN, OUT OF AREA, PRIVATE, etc) 4. Line powered - Requires no external power supplies or batteries. Compatible with FSK/DTMF, PSTN landlines, and VOIP services such as Vonage, MagicJack, Verizon FIOS, Comcast and others. 5.Uses EEPROM technology to prevent losing stored blacklisted numbers when device is disconnected from the telephone line.