Sophisticated in black, the BT Synergy 4500 Telephone with Answer Machine has a whole host of first-class features. It boasts up to 12 minutes recording time, a four-line backlit display and its SMS compatible. Other functions include a 255 name and number phone book, three-way conferencing and polyphonic melodies. Features Answer machine with up to 12 minutes recording time 255 name and number memory Caller display 20 Calls list 3-Way conferencing 50 Message capacity SIM 4- Line blue back lit display