These magnifiers are made of ABS plastic frame and PVC lens, each one worked by a CR2016 button battery (included and installed), designed with credit card size, conveniently placed in the wallet for better space saving.
They have low wattage lights, holding down the power button to keep the light on and the release button off, can be used in low ambient light conditions.
Suitable for seniors, conference attendees, stamp collectors, jewelers, geologists, etc.