Above:  the Sanskrit Power Ring (HT:  the divine Ms. E).  According to its purveyors, 

The amazing and mystically powerful Sanskrit Power Ring ™ is a ring of harmonic energy that protects the wearer from negative energies of all types, dark forces ,witchcraft and the ill will of others. The ring enhances the auric field of the human body and allows the human mind to function on a much higher level of contentment, positivity, peacefulness and joy.

. . .

The design of The Sanskrit Power Ring ™ provides a shield against harmful external vibrations for example geopathic stress and the commonly problematic EMF waves associated with power lines, mobile phones, domestic electrical equipment etc.

The whole human organism is protected by strengthening the human bio-energetic field, guarding against bacteria, viruses and external negative influences.

And as a bonus, unlike other power rings, the Sanskrit Power Ring is not rendered ineffective by the color yellow.