Feature 1 Display Function: DTMF/FSK dual system caller id (automatic identification ). Real time date and week display, LCD brightness level 5 adjustable 2 Call Function: Answered call number and call time record 50 groups (8 bits) or 32 groups (16 bits), dialed call number 14 groups (8 bits) or 8 groups (16 bits) and call time record. 3 Ring Function: 1 to 99 hours do not disturb, 16 common ringtones to select. Three groups of alarm function set, each set of sound different. 4 Optional Flash Time: FLASH time 90/95/100/120/180/300/600/1000ms software is optional. 5 Settings: Software sets the ringing volume, button sets the ringing volume, and hands free volume. Software setup electronic antitheft; Soft setting P/T is optional. 6 Key Function: IP function and single key storage function (M1 M10). R key transfer function, to ring volume adjustment.Item Type: Corded TelephoneMaterial: ABSModel: L019-3Color: BlackWire Gauge: American Telephone LineFunction:DTMF/FSK Dual System Caller ID (Automatic Identification)Call Number and Call Time Record 50 Groups (8 Bits) or 32 Groups (16 Bits)Call Number 14 Groups (8 Bits) or 8 Groups (16 Bits) and Call Time RecordReal Time Date and Week Display, LCD Brightness Level 5 Adjustable1 to 99 Hours Do Not DisturbYou Can Select 16 Common RingtonesSoftware Sets the Ringing Volume, Button Sets the Ringing Volume, and Hands Free VolumeSoftware Setup Electronic Anti Theft; Soft Setting P/T is OptionalFLASH Time 90/95/100/120/180/300/600/1000ms Software is OptionalSet the Alarm Tone for Each of the Three GroupsIP Function and Single Key Storage FunctionM1-M10R Key Transfer FunctionTo Ring Volume AdjustmentApplication: Office, Home, Hotel Room, etc Package List1 x Corded Telephone 1 x Telephone Receiver1 x Tieline 1 x American Telephone Line 1 x English Instruction Manual