Interquartz Gemini CLI 9335 Corded Telephone offers a whole host of benefits to business users and home workers including Caller ID, hands free and headset compatibility, all for a very reasonable price. This model is also ideal for Featureline and Centrex users. Featuring triple standard message waiting (high voltage, reverse polarity and voltage drop), large 3 line LCD, headset port, data port, 100 name / number directory, 20 protectable memories and locking mute button with LED indicator.