Att Black 1740 Digital Answering System. This digital answering system features 40 minutes of recording time, so you never have to worry about your talkative friends using all your space! Audible message alert ensures that you're aware of new messages. Message count and time/day stamp are clearly displayed on the display. In addition, if you subscribe to Caller ID*, this device will announce incoming numbers, so you can screen your calls! Variable speed playback lets you decipher the message even if the dialogue is too fast or slow. Conveniently access your messages remotely using a toll saver. Even if the power goes out, message guard memory will save all your important messages. Digital operation Excellent sound quality 40 minutes of digital recording time Call screening/intercept Remote access