DKT2001: No programmable buttons; single line model which requires users to lift handset to answer.
DKT2010-H: 10-button model which enables users to answer internal calls without lifting the handset.
DKT2010-S: 10-button model equipped with half-duplex speakerphone which enables users to make and receive outside and internal calls without lifting the handset.
DKT2010-SD: 10-button model equipped with an LCD and half-duplex speakerphone which enables users to make and receive outside and internal calls without lifting the handset.
DKT2020-S: 20-button model equipped with half-duplex speakerphone which enables users to make and receive outside and internal calls without lifting the handset.
DKT2020-SD: 20-button model equipped with an LCD and half-duplex speakerphone which enables users to make and receive outside and internal calls without lifting the handset.
DKT2020-FDSP: 20-button model equipped with an LCD and Full-duplex speakerphone which enables users to make and receive outside and internal calls without lifting the handset, external microphone is available as an accessory.
