Real sing Base has 17 groups and handset has 15 groups chord music rings, Ringer ON or OFF choice Call in mumber voice talking function Auto-answer and voice pager function Auto or manually scan free channel,choice the best channel and avoid interference Support up to 3 Handsets, means one Base can support three Handsets When Base check the incoming information, can store the numbers to the memories Handset over-range alarm function Pre-dial (30 digits) function for Base and Handset Pre-arrange calls from a handset when the line is busy Base and handset with the alarmclock, calendar function,conversation auto time The dial out number can be checked (base 25 groups, handset 10 groups) Intercom calling and conversation function Music play function Base seven colour backligt display