The bt converse 2200 telephone has low energy consumption so no additional batteries or power supply unit required it is pabx compatible and is wall mountable it has a headset port and hands free option this bt converse 2200 telephone is a slate metallic colour key features no batteries or power supply unit required elrtbr switchable handset volume control headset port rj11 socket hands free speaker phone operation inductive coupler hearing aid compatible incomin