The KX-TG6821 impresses with its 1.8-inch, white illuminated graphic display for very good readability and first-class user-friendliness. The illuminated NR (Smart) button has additional smart features. It flashes when calls are received or missed, or when new messages have been received on the answering machine. One press is enough to answer calls with the hands-free function already activated or to silence the integrated alarm for another five minutes. The integrated, extended answering machine offers 30 minutes of recording time. The new fast-forward and rewind functions within a message are useful for phone numbers or addresses that have been left. The KX-TG6821 can also call a previously saved number and play the message when new messages are received.