Eco Sensor and Screen Brightness
Eco Sensor measures the light in your room and optimizes the brightness of the TV automatically to reduce power consumption. This causes the TV to brighten and dim automatically. If you want to turn this off, go to MENU > System > Eco Solution > Eco Sensor.
Do not block the sensor with any object. It can decrease picture brightness.
The Evolution Kit Slot (Kit Sold Separately)
This socket is designed to accept an extension device called the Evolution Kit. The Evolution Kit enables the TV to run a variety of the latest applications for a better user experience.
The Evolution Kit is sold separately. When users purchase an Evolution Kit released in 2015 or later, the user's TV can be upgraded to match the software version of the Evolution Kit. However, an Evolution Kit may not be available, depending on the product.