It facilitates reading or observing details. This can be especially useful for people with vision problems or difficulty seeing closely. The 75mm diameter allows for a larger viewing area, providing a better overview and a more detailed view of the observed objects or texts. Built-in LEDs provide additional lighting directly on the observed area, making it easier to view details even in low light conditions. This can be especially useful if you work in dark places or if you need extra lighting to observe objects. Power supply: 2 x AAA batteries (NOT INCLUDED) / Colour: White Size: 17cm x 8.5cm / Material: ABS