The BT914 is rich in features with DECT 6.0 interference-free technology, loud and clear handset speakerphone and adjustable tone control. Expand the BT914 for use throughout the home with up to 5 total handsets using the BT914HS. Features: DECT 6.0 Clarity Power technology amplifies incoming sounds up to 40dB Pair with up to 2 Bluetooth phones, headsets or accessories Adjustable tone control Speakerphone on handset Loud ringer with 10 ring tones to distinguish calls from a landline or cell phone Visual ringer Caller ID 2.5mm headset jack Expandable up to 5 handsets Hearing aid compatible