This is an AT&T (Western Electric) 2514 type Touch Tone modular desk set factory equipped with a two prong jack for a classic headset. The headset is activated by the turn button on the front. Adapters are available from commercial sources to use modern lightweight headsets with this set. This would make a good dispatcher or operator telephone. This phone is used and in very good condition except for a small chip on the mounting cord jack in the back.