Siemens Optiset E Memory Phone - Refurbished - BlackAdvanced model Doubles as either a high power executive phone or attendant phone optiGuide navigation keys 12 feature keys with LEDs Two way optiVoice speakerphone Two volume control keys Electronic notebook allows you to store up to 300 names, addresses, and phone and fax numbers Oversized 8 line x 24 character display Two Easy Add Adapter bays Supports up to four Siemens Optiset E Key Modules Siemens Optiset E Custom Adapters: Acoustic connects