CB2300 The CB2300 is a highly functional business phone complete with a range of features. Along with an inductive coupler to work with hearing aids, it comes with a headset attachment, speakerphone, programmable keys and backlit screen. Key Features Large black and white 3 line display 100 name and number phonebook Hands-free speakerphone Caller ID with 50 entry calls list Headset socket Wall mountable Inductive coupler PABX compatible ELR/TBR switchable Visual ringer indicator