Keep tracking 100 numbers as normal Caller ID, and able to stop unwanted phone Ring. * Store up to 270 phone numbers and names in 3 level (A-Important, B-Normal, and R-Reject). * A mini Computer to Block unwanted calls. Phone will ring only to who you want talk to. * Hour by hour control, group B- which is callers you only want to talk to at certain times. * Four line LCD with Backlight, your personal phone book directly connect to your phone.