US Robotics Cordless Skype/DECT Phone. Headset connectivity: Jack. Frequency band: 1.88-1.90 GHz. Dimensions (WxDxH): 113 x 67 x 126 mm, Base dimensions: 113 x 27 x 126 mm, Handset dimensions: 154 x 48 x 28 mm. Package dimensions (WxDxH): 190.5 x 174.8 x 47.8 mm, Package weight: 470 g. Compatible operating systems: Windows 2000/XP/Vista (32/64-bit), Minimum system requirements: CD-ROM USB Skype, Minimum RAM: 128 MB