Antibacterial directions: "COOSKIN" Antibacterial TPU keyboard protective film has been added nano-silver, which can kill 650 kinds of harmful bacteria. In the test, there were 330,000 Staphylococcus and 160,000 E. coli, after 24 hours we used the film, only less than 10 Escherichia coli and Staphylococcus survived.
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