Amplifies incoming sound up to 40 decibels- Four 4 tone settings to customize your listening experience- Amplified digital answering machine making it easier to listen to messages- Large high contrast CID display- Extra loud and clear speakerphone for hands-free conversations- Large keypad with high contrast numbers- Five 5 speed dial buttons to store important numbers- Ten 10 loud ringer melodies with six 6 levels of volume- CID display lights up as super bright visual ringer- Expandable up to four 4 cordless handsets model D703HS