Bluetooth connectivity � allows you to use the A1600BT with your existing cell phone service ClearDigital Power delivers maximum clarity & background noise suppression 50 dB amplification with full range tone control Speakerphone in handset & base DECT 6.0 system expandable up to five (5) additional handsets (sold separately) 95 dB base & 85 dB vibrating handset ringer Bright visual ringer on base & handset Digital answering system � playback through handset or base Talking caller ID & phonebook Talking keypad �speaks back dialed number 8 photo dial buttons (base); 4 memory dial buttons (handset) Phonebook � stores 30 numbers in base & 50 in handset 6-level ringer volume & 10 ringtones 2.5mm headset & 3.5mm neckloop jack Big button easy-to-read backlit keypad One year warranty For more information please click here Bluetooth features: Hybrid technology allows you to choose either your cellular line or your landline for calls Variable ringtones distinguish between an incoming cell & landline calls For cellular calls, switch between the DECT handset & your cell phone Simultaneously converse on a landline call & a cell phone call using the handset & base Options available: Standard ($219.95) (pictured above) Bundle ($269.95) Comes with expandable Bluetooth headset