Description SINTECH Caller ID Telephone Set ST-7500 PLUS is designed for efficient telephony with a clear LCD, built-in calculator, and hands-free communication. �� 12-digit jumbo LCD with calendar display �� 4 one-touch speed dial buttons ⏰ Alarm clock and calculator functions �� Caller ID support �� 62 call logs (incoming & outgoing) �� Speakerphone (Handsfree) �� 24 ringtone melodies