Function.

Skin tone test system is used for skin tone type test and offering power level suggestion;

Instruction.

a. Battery inside, no need charging;
b. Use alcohol cotton swab or cleaning cloth to clean and disinfect the test window;
c. Let the test window touch treated areas or the areas with the similar skin color flatly then press the turn on/off button;
d. The skin type display will show what skin type by indicator;
e. Skin tone test for more than 2 times to make sure test results accurately.
f. The skin tone sensor is only applicable for GSD's devices. The skin tone test results are just reference for similar devices     from other companies.