Reliable Corded Phone FSK/DTMF dual system compatible, Build in Hold music function, Automatic redialing, Automatic caller filtering, 8 bit calculator, intelligent grab line outgoing code 8 bit setting. Adjustable LCD Display Home phone features 16 digit glass LCD display dial with 5 adjustable brightness settings and real time date. Caller ID Allows to easily view names and numbers of incoming calls at a glance. Caller time record for 50 incoming groups and 14 outgoing groups. Memory Storage One button memory capable of storing 37 groups, and double key memory capable of storing 26 groups. Ring Volume Adjustment Pick from 16 different ringtones and adjust menu setting for ringing volume and hands free volume.