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Mobile user spends time on their phones with a staggering 4.7 hours per day.
RT ring tells you the radiation quantity.
Using mobile in style
Catch the microwave and make it dance
-Absorb energy into light
Red light means safe yet
Black light means keeping away, please
-No other powers needed
To feel what you feel
To show what you might want to know
Clean line in titanium body
Open-end ring with a 1/6 gap
Same proportion with 4.7 hours in a day
Dazzling transparent cube with a silver LED in the bottom
Care about your health with the soft RT ring!
Shanghai Jiao Tong University