Functions: Base: 1) Multi-function PBX system: supports 12 handsets max, with group call, single call and call-transferring functions 2) Large color LCD screen means different working statuses, beautiful and practical 3) Super long distance >8W output power for base,1.5W for handset 4) Specially designed for computerized exchange functions, redial indicated by music 5) FSK/DTMF dual system compatibility display of incoming telephone, also caller ID with date and time, universal throughout the world 6) 16-chord tones for base, giving a pleasant and melodious sound, total 15 tones available 7) Time/date display and setting, when exterior telephone is incoming, date and time change automatically, highly accurate Handset: 1) 16 chord music, 16 tones are available 2) Color LCD screen means different working statuses, beautiful and practical 3) Multi-function handset: single-duplex talk between handsets and call-transferring, one base can support 12 handsets at most. 4) FSK/DTMF dual system compatibility display of incoming telephone, also caller ID with date and time, universal throughout the world 5) Time/date display and setting, when exterior telephone is incoming, date and time change automatically, highly accurate 6) Monitors outer interference signals 7) Call waiting function, one touch connection 8) Long-distance call lock 9) Warning of phone misuse and dialing and safe for 100,000 sets of access pin codes