ATT/Vtech, CS6419, Cordless DECT 1.9GHz Digital with Caller ID, Silver/Black is with Caller ID - With Speakerphone - With Intercom - With Voicemail - With Conference Calling DECT 6.0 Digital technology provides perfect sound quality, security and range in cordless phones Interference free for crystal clear conversations - won't interfere with wireless networks and other electronic devices Protect yourself from identity theft with digital security - your call is digitized and encrypted, making it nearly impossible for someone to eavesdrop Expandable up to 5 handsets using only one phone jack Return phone calls and recall numbers with 100 name and number caller ID memory With just the touch of a button, hands-free conversations are made easy with the handset speakerphone Conference an outside call between handsets 50 name and number phonebook directory - easily store and dial frequently called numbers Voicemail waiting indicator - flashing light on the base and text message on the handset silently alert you when you have messages waiting Backlit keypad and display