Feature:1. AUTOMATIC RECOGNITION: Corded phone is designed with FSK, DTMF caller ID, which can automatically identify.2. 12 BIT LCD DISPLAY: Corded telephone has a 12 bit LCD display.3. CALLER NUMBER: Corded landline records up to 50 groups 8 digits of caller numbers and call times.4. CALLING NUMBER: Wired telephone records up to 50 groups 8 digits of caller IDs and call duration records.5. FLASH OFF TIME: Corded home phone optional flash off time 600ms, which can satisfy your kinds of needs.Specification:Item Type: Corded PhoneMaterial: ABSRinging Test: 25HZ 75VRinging Level (Spacing 0.5m/1.6ft): Ringing Large Block 70dBDTMF Dialing:High Frequency Group Level: -73dBLow Frequency Group Level: -93dBFrequency Frequency Deviation: 1.5%High and Low Level Difference: 21dBHang Up Leakage Current: Standby 80A, Caller ID 1mAHandle Electro Acoustic Indicators:RLR: -8.6dB (0KM), -8.0dB (5KM)SLR: 16.5dB (0KM), 23.8dB (5KM)STMR: 10.3dB (0KM), 13.5dB (5KM).Package List:1 x Corded Phone1 x Telephone Line1 x Instruction ManualNote:US telephone line