Adjustable Hands Headband: Headband magnifying glasses has a rotary button design that can be used to adjust the size of the headband and is suitable for anyone. By rotating the button, you can adjust to the size that best suits your head shape, avoiding too big or too small.
1X to 6X Headband Magnifier Head Mount Magnifying Glass with LED Light for Close
Battery: 3 AAA (Not included).