The face mask is disposable, mainly to prevent dust, haze, droplets etc, and protect human health.
If you use mask for 4 hours continuously, please had better change a new one.
After the mark is used up, please do not abandon it casually, and had better destroy it first.
We supply a full line of custom usb flash drive products, we do not upload all models online, if you cannot find the appropriate usb model you want, pls contact us with your demand, we will reply you as soon as we can. Thank you..
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