This sleek office phone system makes everyday calling easier. A dedicated Call Block button on the base unit and handset makes it simple to register up to 250 unwanted numbers. Text-to-speech technology announces the name of the caller for quick reference. Noise reduction automatically suppresses background interference while enhancing voice tones for clearer conversations. Powerful battery backup system keeps you connected in the event of a power outage. Clearly see numbers, alerts and calling info in any light conditions on the base unit's 2.5" LCD and the super-clear handset LCDs. Additional features include 100 number phonebook, 17 minutes of voice messaging, full duplex speakerphone handsets and more.