I purchased this on Mercari and used it for about six months. It has red switches. I'm selling it because I switched to the K2 Pro. I think it has the best typing feel and key sound among mechanical keyboards. I also have a Realforce electrostatic capacitive keyboard, but this is just as good. It has a number pad but is the same size as a tenkeyless keyboard, which was convenient for making my workspace more compact. It has RGB lighting, which also increases my tension when working. Overall, it's a well-made keyboard. It shows signs of use, but there are no problems with its operation. [The following is a quote from the website] The K4/96% layout (US layout 100 keys) wireless mechanical keyboard with a number pad has a compact design that provides the best productivity and an excellent typing experience. It can connect to up to 3 devices via Bluetooth and easily switch between them. Equipped with a Broadcom Bluetooth 5.1 chipset with high reliability and wide compatibility, the K4 is ideal for use at home, in the office, and for light gaming while connected to smartphones, laptops, and iPads. It also, of course, has a USB Type-C wired mode. [Wired or Wireless] It can connect to up to 3 devices via Bluetooth and easily switch between them. Equipped with a Broadcom Bluetooth 5.1 chipset with high reliability and wide compatibility, the K4 is ideal for use at home, in the office, and for light gaming while connected to smartphones, laptops, and iPads. It also, of course, has a USB Type-C wired mode. [With Number Pad] The US layout 100-key (96%) layout, with the number pad and Del key placement, makes it easy to access frequently used keys on Mac and Windows and can be used in a small space. *NumLock only works on Windows. Product Name: Keychron K4 Version 2 Simultaneous Connections: 3 devices Connection Method: Bluetooth, Wireless, Wired Supported OS: Mac, Windows Accessories: All items included at the time of purchase, such as the box. #Keychron #Realforce #HHKB #Logicool #Razer #Corsair #ASUS