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Finger balance is a concise electronic instrument that can easily weigh your bag when you are puying some food.
Wear the finger balance on the index finger and middle figer like a ring, then, put the belts of the bag naturally on the finger-balance, the weight of the bag will show on the screen.
This design simulates the natural action when we want to weigh some little stuff by lifting with finger.
xiaolin Gui Fan Zhang Linkai Tao Huabiao Shan