Keychron K1 Max QMK/VIA Wireless Custom Mechanical Keyboard, Red Linear Low-Profile Gateron Switch, 80% TKL Size, Tri-Mode Connectivity (2.4GHz, BT, Wired), English-Arabic Layout, Black | K1M-H1-AR

Specifications Number of Keys87 (80%)SwitchesGateron low-profile mechanicalSwitch FaceNorth-facingNumber of Multimedia Keys12Frame MaterialABS + Aluminum frameKeycap MaterialLow-profile double-shot PBTLayoutANSIPolling Rate (2.4GHz and Wired Mode)1000HzPolling Rate (BT Mode)90HzN-Key Rollover (NKRO)Yes for both wireless and wired modesCompatibilityGateron/Keychron low-profile mechanical switches only(QMK does NOT support low-profile optical switches)Backlit22 types of RGB backlight options plus endless possibilitiesBattery2000 mAh rechargeable li-polymer batteryWireless Working Time (Backlit off)Around 95 hours (Lab test result may vary by actual use)Wireless Working Time (RGB)Around 50 hours (Lowest brightness)Connection2.4 GHz / Bluetooth / Type-C wiredBluetooth Version5.1Bluetooth Device NameKeychron K1 MaxCompatible SystemmacOS / Windows / LinuxDimension346 x 118.5 mm (13.62 x 4.66")Weight608 g / 1.34 lbsHeight without Keycap (front)7.72 mm (0.3")Height without Keycap (rear)14.7 mm (0.58")Height incl. Keycap (front)18.2 mm (0.72")Height incl. Keycap (rear)24.1 mm (0.95")Typing Angle3.37º, 4.2º and 6.7ºMCUARM Cortex-M4 32-bit STM32F402 (256KB Flash)Operating Environment-10 to 50℃