Sony 40" LED 1080p 60Hz HDTV | KDL40R350B [Derivative] This KDL4R350B is a derivative TV model This product lacks several key features that are found on the similar and more popular KDL40W600B, such as Skype, Twitter and other smart features. Vertical Resolution: 1080p Maximum Resolution: 1920 x 1080 Screen Refresh Rate: 60Hz