Caller ID feature enables users to identify the incoming caller's name and number before they pickup the call. Usually right after first ring this string comes from your Phone Company and Caller ID devices capture it to show to users. Most of the caller ID devices in market are stand-alone units, which have lots of shortcoming and drawbacks. These have tiny displays with maximum of 100 numbers storage or so. Talking Caller ID features unlimited storage and enhanced blocking and forwarding.