Keychron K4 Pro QMK/VIA Wireless Mechanical Keyboard ,Fully-Assembled,Hot Swappable,RGB Backlight, K Pro Red Switches K4P-H1

Wireless and Wired An excellent solution for multitasking. You can connect the K4 Pro with up to 3 devices wirelessly via its stable Broadcom Bluetooth 5.1 for seamless multitasking across your laptop, phone, and tablet. Switch among them swiftly, and it’s fully compatible with both Mac and Windows.A reliable USB Type-C wired connection is also available when you need it. Program with QMK & Launcher. The open-source QMK firmware means endless possibilities for key remapping, macros, shortcuts, and more. Now you can easily customize each key with the Keychron Launcher web app. Upgraded Typing Experience The K4 Pro has been re-engineered and redesigned from the inside out to upgrade the typing experience. The added sound-absorbing foam, a thick silicone dampening bottom pad, and steel plate provide responsive feedback and a peaceful typing sound, while added weight will enhance the stability. Suitable For All Devices Offers a Mac layout while still being compatible with Windows, the K4 Pro is one of the few on the market that has the same multimedia and function key functions as Apple keyboards for Mac users, but with more tactile feedback.You can even configure different keymaps for both Mac and Windows devices. While Keychron Launcher web app is compatible with macOS, Windows, and Linux. Includes keycaps for both macOS and Windows (3 keycaps for each) to allow you to switch between operating systems with ease. Hot-swappable Every detail matters, so we make the K4 Pro hot-swappable for your personalized typing experience. The hot-swappable sockets are mounted on the PCB, so you can hot-swap every switch on the K4 Pro with almost all of the 3pin and 5pin MX style mechanical switches on the market (including Cherry, Gateron, Kailh, Panda, etc.) without soldering. You can customize your own typing experience in seconds.   SPECIFICATION Number of Keys: 100 (96%)Switches  (Not including Barebone Version): Keychron K Pro MechanicalSwitch Face: South-facingStabilizers: PCB-mounted screw-in stabilizersNumber of Multimedia Keys: 12 Frame Material: ABSPlate Material: SteelKeycap Material (Not including Barebone Version): Double-shot PBTKeycap Profile: OSA (OEM profile with spherical-angle)Layout: ANSIPolling Rate (Wired Mode): 1000HzPolling Rate (Wireless Mode): 90HzN-Key Rollover (NKRO): Yes for both wireless and wired modes CONNECTIVITY AND POWERBacklit: 22 types of RGB backlight options plus endless possibilitiesBattery: 4000 mAh rechargeable li-polymer batteryBT Working Time (Backlit off): Around 260 hours (Lab test result may vary by actual use)BT Working Time (RGB): Around 130 hours (Lowest brightness)Connection: Bluetooth and Type-C cableBluetooth version: 5.1Bluetooth Device Name: Keychron K4 ProCompatible System: macOS/Windows/Linux PHYSICAL UNITDimension: 390.6 x 139.2 mm (15.38 x 5.48″)Weight: About 1280 g / 2.82 lbsHeight without keycap (front): 24 mm (0.94″)Height without keycap (rear): 31 mm (1.22″)Height incl. keycap (front): 33 mm (1.30″)Height incl. keycap (rear): 40 mm (1.57″)Typing Angle: 3º, 7º and 10ºMCU: Ultra-low-power ARM Cortex-M4 32-bit STM32L432 (128KB Flash)Operating Environment: -10 to 50℃