Semi-Cordless PhoneFSK/DTMF dual system Caller IDHandset can be used with or without line60-group caller ID memories and 60-group VIP memories16-group outgoing calls memories, search/redial of incoming calls , search the dialed numbers and time9 one-touch memories and 10 two-touch memories12 digits blue backlight LCD with date & time display24-group ringer tones selectable, 10 digits calculator and 5 levels LCD brightness adjustableAuto timing of talk, handsfree dialing and talkSwitch adjustment of volume and handsfree volumesAutomatic redial3-levels mechanical lock functionAuto filter local numbersMusic on hold functio