1. We have 20 years production experience of optical instrument, 10 years alibaba export experience, our mainly products including magnifier, microscope, pocket microscope and binocular.

2. Various of deifferent types magnifier for your choose, which including illuminated magnifier, handheld magnifier, LED magnifier, handle magnifier, pocket magnifier, light magnifier desk magnifier and multifunction magnifier.

3. So Powerful customer service, can reply you in 24 hours and offer all the solutions and solve problems for clients with our team.

4.For after-sale service, magnifiers can return to us if the problems is on our side. 

5. Custom and OEM order available.

1. Why LED lamp can ' t light?

Reason1: Battery compartment does not pull out the insulation sheet

Reason2:Switch loose.

Reason3:Battery compartment is bad

2.Why can ' t see clear with a magnifier?

Reason: the distance between magnifier and object is not suitable?

How to use: Let magnifier close observation of objects observed object does not move, the distance between the eye and the object of constant observation, move magnifying glass between the object and the human eye moves back and forth, until the large and clear image.

You can also close magnifying glass eye as close as possible. Magnifying glass does not move, moving objects, until the large and clear image.

3.The relationship between magnification and diameter of lens?

Inverse relationship , that ' s mean more higher magnification with less diameter lens.

4.The relationship between magnification and focus?

Magnifying ratio = 250 / lens focal length +1