The order reached 15 days before Vladimir. Shipped on the day of the order, in the puppy and fully corresponds to the description. I took for the backlight of the keyboard. Connected via external battery. Depending on the power source, the brightness changes, the brightest light from the network (power supply) and from the computer, from the battery a little dim. Buttons can be seen well, yes great brightness for them and not needed. To read books brightness is also enough, but better through the power supply. The thing is not bad, as "ambulance" is suitable for different occasions. I recommend the seller and the product, everything is fast and high quality.