Full duplex Voice quality like the Polycom Premier Includes a 2.5mm jack for connection to other communication devices (mobile phones, etc.) Caller ID and phonebook 25# Phonebook/speed dial list Patented acoustic clarity technology allows simultaneous, natural, freeflowing conversation Twice the loudness and microphone sensitivity of the original SoundStation eliminate ear strain and repetition Connects into any analog phone jack and can be connected to a PBX with an analog extension Dimensions: 14.5"L x 12.25"W x 2.5"H Weight: 1.75 lb. Network interface: 2-wire RJ-11 analog PBX or public switchedtelephone network interface Includes standard telephone keypad with on-hook/off-hook, conference, mute, volume up/down keys, menu, navigation keys, 3 context sensitive soft keys including redial, hold, programmable conference key 132x65 pixel backlit graphical LCD Backlit display provides important information (displays console phonenumber, number called, duration/progress of call and supports worldwide caller ID) User selectable ring tones Multi-lingual support: English, German, French, Italian, Spanish, Portuguese, Norwegian Password protected configuration settings for administrators 3 Built-in cardioid microphones Up to 10 ft. microphone pickup range Gated microphones with intelligent microphone mixing Dynamic noise reductionInterfaces GrayPackage contents: Tabletop console (with keypad and display) 21 Cord to console 7 Telco cable to RJ-11 telephone jack ManualPYSOUNDEX2