Landline Test Phone,Telecom Check Telephone Line Check Tester to Alligator Clip Telephone, Caller ID Display/Redial/Pause/FSK DTMF Supported, for Home Office Hotel

AUTOMATIC RECOGNITION: Corded telephone is designed with , DTMF caller ID, which will routinely identify.
16 BIT LCD DISPLAY: Corded telephone has a 16 bit LCD display with real time date and day display. LCD brightness 5 levels adjustable.
CALLER NUMBER: Corded landline records as much as 57 teams 8 digits or 36 teams 16 digits of caller numbers and contact times.
CALLING NUMBER: Stressed telephone records as much as 16 teams 8 digits or 9 teams 12 digits of caller IDs and contact duration records.
FLASH OFF TIME: Corded home telephone optional flash off time 300 600 1000ms, which will satisfy your sorts of wishes.