Very bright, easy to adjust. However, the cord is much too short, being 1 meter long, and it has a round connector instead of USB-C. No battery, it only works when plugged into the mains.

The product arrived in excellent condition and on time. It was packaged properly. It works very well. All the functions are working. The emitted light is very strong. When the device is set to higher brightness, you cannot look at its screen because the light is even too harsh. It's difficult for me to say after such a short time if it has the medical properties that the manufacturer claims, but it seems to improve my mood. Therefore, I highly recommend both the store and the product itself.

Small mishap with the sending of a broken item, but very quickly replaced! Therefore, nothing to complain about.

Powerful, different color of warm white and in between the two.