1Fine workmanship, compatible for DTMF/FSK double system. 216-digit blue light LCD display, 16 level brightness adjustment. 399 group call memory(dynamic memory), 18 group outgoing calls memory(dynamic memory), 3 single key memory. 45 kinds of normal ringtone for selection, 4 kinds of polyphonic ringing music for selection. 5Professional manufacturing, do not disturb function, music on hold.
