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Almost everyone has a smartphone, but the virtual keys are a little too small to enter the right word without misdakenly enter at one time when using the keyboard, so some person use the stylus but that is’t easier to use than our finge. On the other side, some people’s finger joints got inflammation or skin of finger with uncomfortable feeling because touch the screen again and again which incloudig correcting the sentence the user type.
Now, “Key Finger”can help user reduse the finger joints got inflamation because user can type the right word easily, and protect the finger pulp will not get uncomfortable.
I Hsu Chen