The VTech CS6719-15 Cordless Phone with Caller ID features an expandable system in which you can add up to five additional handsets (uses CS6709). This phone set includes a backlit keypad and display for easy viewing, ECO mode power-conserving technology and a quiet mode that silences the ringer to prevent interruptions. The VTech phone system with call waiting has caller ID, a full duplex handset with speakerphone and an indicator that notifies you of an awaiting voicemail

Know who’s calling with caller ID/call waiting. Handset displays the name, number, time and date of incoming calls.
Enjoy a speakerphone that can keep up with your calls. Increase participation by allowing both ends to speak—and be heard—at the same time for conversations that are more true to life.
The entire keypad illuminates along with the LCD screen, allowing for easier viewing in dim light.
Power-conserving technology manages consumption for optimal battery performance.
This unit uses the CS6709 accessory handset (sold separately).