The Ericsson Dialog 4222 Office is a desktop telephone with 13 LED keys and provision for an attachable key panel. Hands free, it has a programmable ringer, loudness and tone character, as well as an integrated headset port and a dedicated headset key. Two row display Hearing impaired support with amplification 6dB Acoustic shock protection Supporting option unit port LED keys 13 Programmable keys can be labelled by the user Provision for attachable key panel Hands free speakerphone Programmable ringer, loudness and tone character Headset port Adjustable foot console. Wall mountable