The hole under the mouse is very small. This technology is a patented technology used on the mouse by Taiwan Province Shuangfeiyan Company. Its name is Shuangfeiyan? Needle light mouse.
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If you want to buy it again, you can go to your Shuangfeiyan. Mouse and keyboard shop to buy, you can choose? Shuangfeiyan? Invisible light model of stylus mouse.
You can also be there? China shopping website-"Taobao" website input the corresponding keywords to search.
References:
Baidu encyclopedia-? Double swallow
● ? I hope my answer can help you.
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