I tried the K68 portable Bluetooth mechanical keyboard that can be purchased for 20,000 won. It can be used by connecting two Bluetooth devices at the same time as well as 2.4G wireless connections to switch three devices. Compared to a typical small Bluetooth keyboard, a mechanical keyboard puts more importance on the feeling of typing. This product is suitable for those who need to type for a long time or think about the efficiency of their work. It is a product that can be easily connected to various products such as tablet PCs and laptops as well as smartphones.