Compact 96% layout Bluetooth Mechanical Keyboard 15+ types of RGB BacklightKeychron K4 is a hot-swappable 96% layout (100-key) RGB backlight Bluetooth mechanical keyboard. The K4 is crafted to maximize your workspace and enhance productivity. With a unique Mac layout provides all necessary Mac function keys, while compatible with Windows. It connects with up to 3 devices with the latest Broadcom Bluetooth 5.1 chipset proved from time to time. Hot-swappable version The K4 gives the freedom to customize your typing experience with its hot-swappable PCB. The pre-installed Gateron G Pro mechanical Brown switch features a nice tactile feeling with a durable 50 million keystroke lifespan. Keychron K4 Highlights: 96% layout wireless mechanical keyboard Hot-swappable (Gateron G Pro mechanical brown switch pre-installed) Wireless & Wired For Mac & Windows 15+ types RGB backlight Bluetooth 5.1 Up to 240 hrs of typing (backlight off) Read more Hot-swappable Personalize your typing experience with ease, you can alter every gateron switch on the Keychron K4 without the need to solder. Socket of Gateron (Hot-swappable) is compatible with almost all the MX style 3pin (The "~" key supports 3pin only) and 5pin mechanical switches on the market (including Gateron, Cherry, Kailh, etc.). Wireless and Wired Modes The K4 connects with up to 3 devices via Bluetooth or to a single device with the USB Type-c wired mode for a consistent power supply. Pair it up with your smartphone, laptop and iPad and switch amongst the devices swiftly. It offers a highly reliable and broad compatibility Broadcom Bluetooth chipset that is best for home, office and light gaming uses. Suitable for All Devices With a unique Mac layout and Windows compatibility, the K4 is offering convenient accessibility to all the essential multimedia and function keys. Just plug and use, no driver is needed. Extra keycaps for both Windows and Mac operating systems are included. Read more 4000mAh Big Battery The K4 can last up to 240 hours (with backlit disabled) with a 4000 mAh big battery, which is one of the biggest in mechanical keyboards. N-key rollover (NKRO) on wired mode or 6KRO on wireless mode. 15+ RGB Lighting Options Charming RGB lighting with elegant legends will match up to your mood, you can also choose other static backlight modes. One More Thing Inclined bottom frame makes the K4 version 2 more comfortable to crank out emails or write a novel. Added dedicated caps lock indicator light and relocated the Del key base as customer feedback. Read more SPECIFICATION Number of Keys 100 Keys Frame Plastic Frame Switch Type Gateron G Pro mechanical Brown Switch pre-installed Lighting 15+ types of RGB Backlight Keyboard Interface Bluetooth & Wired BT Version Bluetooth 5.1 Operating System Windows/Android/Mac/iOS BT Working Time Up to 72 hours (Lab test result may vary by actual use) Dimension (Plastic frame) 371 x 124 x 38mm Package contents 1x Keyboard; 1x Windows Keycaps; 1x USB-A to USB Type-C Cable; 1x Keycap Puller; 1x Switch Puller; 1x User Manual