Mitel 9113-000-200 Superset 401 Single-Line Phone (Dark Grey/Refurbished)The Mitel Superset 401 Single Line Phone is a digital single line telephone that has an enhanced design and functionality. This phone works with any Mitel Telephone System that uses the DNIC Card. Key Features: Speed Dialing Conference Call Set Up Ability Transfer Call Ability Hold Button Handset Handset Cord Line Cord Professional Appearance Dark Grey Compatible with any Mitel Telephone System that uses the DNIC Card