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. Caller ID with 80 memories Large 3 line LCD Headset port, data port Full handsfree operation 100 name/number directory, 20 protectable memories Locking mute button with LED indicator ELR/TBR switchable (100/200/300/600 ms) Last number redial with 5 memories, recall button Ringer volume adjust, ringer indicator light Hearing aid compatible