Efficient Rechargeable Batteries: Say goodbye to heavy glasses magnifying glasses! Head Magnifier with the board stores electricity instead of the traditional batteries, making the magnifying glass lighter and giving you a more comfortable trial experience. Convenient USB Charging Interface: No need to replace the battery, just fill it up in an hour! USB charging interface is more convenient and environmental. You can be directly powered through USB interface. One-hour charging time provides up to 8 hours of working time for rechargeable batteries. 5 Different Magnification Lens for Close Work: Headband magnifier glasses provides five magnification 1X, 1.5X, 2X, 2.5X, 3.5X. The size of the object can be observed to choose the required lens such as sewing, needle work, knitting, , embroidery, etc. Flexible & Comfortable Nose Bridge Holder: Protect your nose! The nose bridge holder of hands free magnifying glass is adjustable you can adjust it according your need. Efficient rechargeable