Northwestern Bell 5.8 GHz Multi-Handset, 2-Line Cordless Phone with Call Waiting Caller ID, Digital Answering System and SpeakerPhone (35828-M2) 5.8 GHz analog signal transmission; supports 2 lines 2 handsets, 40-channel auto-scan Call waiting/caller ID with 20-station memory Digital answering system on base Handset speakerphone