Summary 

Two testers in one.

The dichroscope is the same as .
Instructions are not included with this item.

The Chelsea Filer is the same as  (except that our ref. chfilt is the original English filter, as designed at the Chelsea College of Science and Technology in 1934; this version was designed in China more recently).  Instructions not included with this item.

Is it easy to use?

Yes. 

Limitations & Disclaimer

All equipment and materials must be used in conjunction with the user's skill, knowledge and experience. Under no circumstances shall QUICKTEST be liable for direct or indirect loss sustained in connection with any item. It is your responsibility to regularly check equipment against known samples, to ensure that it is working correctly.