First the good points.Rubber construction seems adequate for the price. The lens gives a bright picture. The supplied lanyard is functional. The device will allow the LCD screen to be seen clearly in bright sunlight and people with 20/20 vision will see a clear image.Bad points.If you wear glasses then the device must be used with them or a blurred image will be seen. The description refers to dioptre adjustment which is not present and so the device cannot be used without glasses by glasses users. The screen diagonal measures 3.15" and does not quite show a full 3.2" LCD screen.I will keep the device for use in bright sunlight with glasses. I was hoping not to have to wear the glasses! The item is incorrectly described.