DECT 6.0 technology; Caller ID–stores up to 50 calls; Call Waiting; Connects to Bluetooth(R) ; Full duplex handset speakerphone; Backlit keypad & display; ECO mode for conserving power; Up to 25 min of recording time; Call intercept; Message retrieval from handset; Call block; Last 10 number redial; Eng/Sp/Fr trilingual prompts; Expands to 5 handsets ; Uses DS6601 handset;