Uniden Big Button Cordless Phone and Digital Answering System (EZAI2997) Expandable up to six handsets Built-in digital answering system with 14-minutes recording time and adjustable playback speed Audio boost up to 20dB and adjustable audio tones DECT 6.0 big button cordless phone with digital answering system Do not disturb key sends all calls to digital answering system DECT 6.0 big button cordless phone with digital answering system Audio boost up to 20dB and adjustable audio tones Do not disturb key sends all calls to digital answering system Built-in digital answering system with 14-minutes recording time and adjustable playback speed Expandable up to six handsets