1. Display Function: DTMF/FSK dual system caller ID (automatic identification). Real-time display of date and day of the week, LCD brightness level 5 adjustable. 2. Call Function: Answered call number and call time recording 50 groups (8 bits) or 32 groups (16 bits), dialed call number 14 groups (8 bits) or 8 groups (16 bits) and call time recording. 3. Ringtone Function: 1 to 99 hours do not disturb, 16 common ringtones to choose from. Three groups of alarm function settings, each set sounds different. 4. Selectable Flash Time: FLASH time 90/95/100/120/180/300/600/1000ms software is optional. 5. Settings: Software sets ringtone volume, button sets ringtone volume and hands-free volume. Software setting electronic anti-theft; Soft setting P/T is optional. 6. Key Function: IP function and one-key storage function (M1 M10). R key transfer function, to adjust ringtone volume. Item Type: Corded Phone Material: ABS Model: L019-3 Color: Black Wire thickness: American telephone line Function: DTMF/FSK Dual System Caller ID (Automatic Identification) Call Number and Call Time Recording 50 Groups (8 Bits) or 32 Groups (16 Bits) Call Number 14 Groups (8 Bits) or 8 Groups (16 Bits) and Call Time Recording Real-time Display of Date and Day of the Week, LCD Brightness Level 5 Adjustable 1 to 99 Hours Do Not Disturb You Can Choose 16 Common Ringtones Software Sets Ringtone Volume, Button Sets Ringtone Volume and Hands-free Volume Software Setting Electronic Anti-theft; Soft Setting P/T is Optional FLASH Time 90/95/100/120/180/300/600/1000ms Software is Optional Set the Alarm Tone for Each of the Three Groups IP Function and One-Key Storage Function (M1-M10) R Key Transfer Function To Adjust Ringtone Volume Usage: Office, Home, Hotel Room, etc 1 x Corded Phone 1 x Phone Receiver 1 x Connection Cable 1 x American Telephone Line 1 x English Instruction Manual