Doubleshell keyboard is not easy to use

the reason why it is not easy to use is that the design of the double-layer keyboard makes the keys need deeper pressing force. And the distance between the keycap and the optical sensor will also affect the response speed and accuracy of the keyboard. The price of double-layer keyboard is usually higher than that of ordinary keyboard, which is not suitable for ordinary users. If you want to get a better typing experience and higher productivity, you can choose the traditional single-layer keyboard.