Big Button Corded Phone Hands Free Calls LCD Adjustable Brightness One Touch Speed Dialling Landline Telephone Black Item Type: Corded Phone Material: ABS Color: Black Main Functional Features: 1. DTMF and FSK dual format caller ID (automatic identification) 2. 50 groups (8 bit) or 32 groups (16 bit) of incoming call number and call time records 3. 14 groups (8 digits) or 8 groups (16 digits) of outgoing call numbers and call time records 4. Real time date and week display, 5 levels of LCD brightness adjustable 5. Software setting electronic anti theft; optional soft setting P or T, no switch 6. FLASH time 90 95 100 120 180 300 600 1000ms software optional 7. In forgetting to close the line or hang up bad, automatically close the line (under the line without noise interference) 8. Intelligent line grabbing out of the code 8 bit setting 9. 8 bit local code settings, automatic filtering of incoming calls 10. R key function, can be used with the switch to do transfer function 11. the machine has a large ring function 12. 10 groups of double key memory