V-Tech CS5121-2 5.8GHz Two Handset Cordless Answering System with Caller ID (Silver/Black) Cordless phone system with two handsets and a digital answering machine Operates on 5.8 GHz frequency that won't interfere with wireless networks Built-in digital answering machine offers reliable and instant access to messages Caller ID/Call waiting compatible with memory for last 45 callers Phonebook directory with memory for 20 entries