Choose high light transmittance、 transparency of optical glass lenses; Simple and easy to use、 flexible; Metal ring is fixed、 the movable handle、 with the function of the lamp;Suitable for reading、 Identify true bogus yuan antiques、 stamps etc. Dimensions: 6.69 in x 2.72 in x 1.14 in (17.0 cm x 6.9 cm x 2.9 cm) Weight: 3.25 oz (92 g)