VTech CS6859-4 DECT 4-Handset Landline Telephone with Answering System DECT 6.0 Digital technology / Energy Star Certified Digital Answering System/Caller ID/Call Waiting 50 name and number phonebook directory; 50 name and number Caller ID history; Up to 14 minutes of digital recording time Large LCD backlit base display and backlit cordless handset keypad and display Conference between an outside line and up to 2 cordless handsets