Main functions: 1) One base can support 12 handsets. Increase extra handset by yourself. 2) Color LCD display on both base and handset 3) 16-tone, 18-tune ringer 4) Base and handsets have 100 built-in frequencies, adjustable when interference is encountered 5) PLL frequency gives high stability 6) Extensive range: up to 20km Base functions and features: 1) Announces incoming and dialing numbers 2) Color LCD display on base 3) 16-tone, 18-tune ringer 4) Displays caller ID 5) FSK / DTMF dual system compatible 6) Displays incoming caller ID (universal throughout the world) 7) Recalls 16 groups of dialed numbers and times 8) Recalls 16 groups of unanswered numbers and incoming time (month, date, hour, minute) 9) Recalls 16 groups of answered numbers and incoming time (month, date, hour, minute) 10) Cancel stored numbers one by one, item by item or all 11) Clock display and setting (manual or automatic) 12) Alarm clock and setting 13) Large screen multi-functional LCD 14) LCD night-light and keypad tone 15) Pages to handset 16) Adjustable ring volume and handset volume 17) Interface to outgoing phone (extension) connection Handset functions and features: 1) Announces incoming and dialing numbers 2) Color LCD display on handset 3) 16-tone, 18-tune ringer 4) Displays caller ID 5) FSK / DTMF dual system compatible 6) Displays incoming caller ID (universal throughout the world) 7) Recall 10 groups of dialed numbers and times 8) Recall 15 groups of unanswered numbers and incoming time (month, date, hour, minute) 9) Recall 15 groups of answered numbers and incoming time (month, date, hour, minute) 10) Clear stored numbers one by one or all 11) Clock display and setting (manual or automatic) 12) Alarm clock and setting 13) Pages to base 14) 10 stored numbers for quick look-up or access 15) Monitors external interference 16) Eight choices of incoming display 17) Two keypad tones 18) Dual tone / pulse dialing 19) Recalls last call made 20) Handset equipped with car-carrying antenna, car-carrying charger and earphone cable socket 21) Volume is adjustable in operation 22) Optional half-duplex conversation between handsets Inner packing: 1pc/color box + polyfoam protection Outer packing: Export carton