Patented Clarity Power technology clearly amplifies incoming sounds up to 40dB- DECT 6.0 interference-free technology- Adjustable tone control- Digital Answering Machine- Loud and clear handset speakerphone- Easy-to-read Caller ID display- Large backlit keypad is largest of any cordless phone- Backlit keypad and CID display act asvisual ringers- Ten 10 loud-and-clear ringtones with six 6 levels of volume- Includes belt clip and 2.5mm headset jack- Hearing aid compatible- Expandable up to five 5 handsets.