This genuine Sony remote control, model RM-YD025, is perfect for controlling your KDL-40S4100 or KDL-46S4100 TV. With a wireless range of 5-10 meters, you can sit back and relax while adjusting the settings from afar. This remote features both wireless and infrared connectivity, and is compatible with Sony TVs and the brand's multicolored design ensures it looks great alongside your other electronics. Plus, it's an OEM original, guaranteeing its quality and durability.