Patented Clarity Power technology clearly amplifies incoming sounds up to 40dB- DECT 6.0 interference-free technology- Adjustable tone control- 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 as visual ringers- Ten loud and clear ringtones with six levels of volume- Includes belt clip and 2.5mm headset jack- Hearing aid compatible- Expandable up to 5 handsets