TT Systems Caller ID Box (BE50CWL) Screening your phone calls is a luxury that we can all be thankful for, but why wait for the answering machine to pick up to see who it is? With this Caller I.D. you can see whos calling immediately! This Caller I.D. features Call Waiting and a 50 name & number memory Displays name & number of call waiting caller while on the first call New call & voice mail light Easy-to-read 3-line LCD display