The Gigaset C530A Duo has a color display with backlight, which makes it easy to control. You can personalize the C530 by choosing a special ring melody for friends and relatives. This way, you'll always know who's calling. On top of that, there's plenty of space for all your contacts in the extensive address book, which allows you to store up to 150 numbers. Not home? The answering machine can record up to 30 minutes of messages. Thanks to HSP sound technology, all your calls benefit from good sound quality.Note: the Gigaset C530A Duo includes 2 handsets. Want to be reachable in more than 2 rooms? You can expand this device with extra handsets.