Comfortable to wear, these lighted magnifier glasses leave both hands free for grafting larvae in queen rearing. The adjustable pivots on the headband allow the visor to be tilted out of the way when needed but leave it right at your fingertips when you need it again. The headband can be adjusted to fit virtually any head size. It features four levels of magnification to ensure you don't miss a thing. Lamp brightness can also be adjusted if needed. Batteries are included.