Time Division Duplex Technology alternates "send" and "receive" digital signals, which makes conversations difficult to monitor, giving you extra security. The Diversity Antenna System uses two omnidirectional antennas for increased signal sensitivity and sound quality indoors.

Among the standard features of the KX-TG2451B is its shock-resistant design. Special construction and a rubberized trim help the handset stand up to wear and tear. Call-waiting Caller ID can display the number of incoming callers even if you're on the line. Fifty names and numbers can be stored in memory for easy retrieval and callback.