Plantronics UPCALISTO Bluetooth Headset (Discontinued by Manufacturer) Hands-free phone system allows you to answer your landline, mobile, and VoIP phone calls with one device Operates on DECT 6.0 frequency for superior range, sound quality, and security Download contacts directly onto the phone from Outlook or Apple Address Book (with Mac-compatible software) PC software compatible with Skype and Yahoo! Voice and most enterprise IP softphones. Mac software compatible with Skype. Backed by a 1-year warranty