Jewelry Spectroscope with Wavelength scale of 400-700nm

Specification:

1, With 12V/50W integrated and cold light halogen lamp.

2, With 600nm optic fiber tube.

3, With built-in fan for long time working.

4, With adjustable light diameter of 2nm to 28nm.

5, With Double adjustable light source.

6, With Wavelength scale( range from 400 to 700nm)

7, With worldwide voltage:110V-240V.