The flush buttons highlight the high quality of the phone. The frameless illuminated keypad ensures optimal ease of use. The elegant anthracite color gives the cordless phone a unique sophistication. The newly designed navigation key and the large high-resolution display perfectly complement the modern look, making the Gigaset CL660HX a true eye-catcher. A phone for everyone: The universal handset CL660HX is compatible with all common internet routers, such as the FRITZ!Box, Telekom Speedport, and many other models. This means you automatically benefit from the latest internet telephony and enjoy naturally sounding audio quality in HD voice with the CL660HX. Additionally, numerous comfort features are available: an internal answering machine, access to the router's phonebook, and call lists for incoming, outgoing, and missed calls. The CL660HX cordless phone can easily be personalized with custom ringtones, your own photos, and screensavers. It is also possible to display a picture of your caller if you have saved the contact with an image in the address book. You can easily personalize your CL660HX with the free Gigaset Quick Sync software. Manage all your contacts with Gigaset Quick Sync software more easily than ever. The extensive address book of the CL660HX offers space for up to 400 entries, each with three phone numbers. These can be quickly synchronized from your PC or Mac via Micro-USB and with the address books from MS Outlook, Windows, or Google Cloud. Synchronizing contacts with images is also possible. Just as practical: VIP numbers and the birthday reminder function for particularly important people and occasions.