This package includes the base BT914 unit and 2 BT914 handsets, up to 5 handsets at additional cost. Cellphone at Home allows you to make calls with or without a landline connection Pair up to 2 Bluetooth phones, headsets, or accessories Patented Clarity Power technology clearly amplifies incoming sounds up to 40dB Download up to 1,000 contacts from your cell phone via Bluetooth DECT 6.0 interference free technology Adjustable tone control Digital answering machine Loud and clear handset speakerphone Easy to read caller ID display that flashes as a visual ringer 10 loud and clear ringtones that can be programmed for each line or paired device Large, easy to use keypad Expandable up to 5 total handsets Hearing aid compatible