What do you call this ring?

If you look at this ring, there is a frequency-like mark.

I often see people wearing rings like this, what do you call rings like this?

332 2017-04-11 Gentleman

popular What are the side effects of oats?

popular Why does it say that your license has expired on your phone?

popular Can I listen to music with Bluetooth earphones on the plane?

popular Is hair spray not allowed on the plane at all?

popular How do I recycle and recycle foil like cooking foil?

Same Tag Which ring brand would suit a woman in her mid-20s?

Same Tag I don't know my girlfriend's ring lake.

Same Tag Where can I buy a ring made of Chinese characters?

Same Tag What should I do if it's the cheapest for coupling?

Same Tag Can the string ring be extended?

Same Time Please recommend an air purifier that I can put in my small room

Same Time What do you call this ring?

Same Time What do the elderly people do with luxury brand shopping bags in Jongno?