Mfr. Part # 9132-015-200 20-character digital display screen for displaying caller ID, call status, and programming options On-hook dial Dedicated headset jack SuperKey programming for easy access to PBX telephone system features 7 programmable keys with LED indicators Limited Automatic call Distribution (ACD) functionality Speed calling Placing calls on hold Transferring calls Setting up conference calls Voicemail access - large message waiting lamp Wall mountable Works with the SX-200 ML/EL or the SX-2000