Both the handset and base have built-in speakerphones, and the base has its own dialing pad, making it possible to call from the base even if the handset is away from it. The phone also has features like talking caller ID, talking alarm clock and battery indicator, as well as silent mode and a caller blocking list that can automatically give a busy signal to unwanted callers. There is also a built-in digital answering machine. The handsets and base can all be used as intercoms. The KX-TG6442 can also expand to include up to 6 total handsets. The base and additional charger take about 7 hours to charge the handsets' batteries, and battery life is about 5 hours of talk time or 11 days of standby time.