This Co. have total
Smart Card (TM card, Information Button, Touch Memory)
Dimension: diameter 16.25MM, high 5.9MM
Function: anti-water, anti-shake, anti-rust; the shell is made by 304 stainless steel, never rust; the chip is made by new TM1990A wafer, unique 64bit serial number of the world. Full compatible with ds1990A(R).
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