Keychron K4 (version 2) Hot-Swappable RGB Backlight ALUMINUM Frame - Red Switch

SPECIFICATION Number of Keys: 100 keys (*Num Lock works with Windows OS only) Switch: Gateron Red, Blue, Brown *The #34;~ #34; key supports 3pin switch only Number of Multimedia Keys: 12 Main Body Material: ABS / Aircraft-grade aluminum frame Keycap Material: ABS Layout: ANSI CONNECTIVITY AND POWER Backlit Types: 18 Backlit: Adjustable 4-level RGB backlit System: Windows/Android/Mac/iOS Battery: 4000mAh Rechargeable li-polymer battery BT Working Time (Backlit off): Up to 240 hours (Lab test result may vary by actual use) BT Working Time (Single LED): Up to 68 hours (Lab test result may vary by actual use) BT Working Time(RGB): Up to 72 hours (Lab test result may vary by actual use) Charging Time: Around 3 hours Connection: Bluetooth and Type-C cable Bluetooth version: 5.1 Bluetooth Device Name: Keychron K4 Compatible System: macOS/Windows/ PHYSICAL UNIT Dimension (Plastic frame version): 371 x 124 x 38mm Weight: About 770g / 1.69 lbs Dimension (Aluminum frame version): 376 x 129 x 38mm Weight: About 933g / 2.05 lbs Operating Environment: -10 to 50℃ PACKAGE CONTENT 1 x Keyboard 1 x USB-A to USB Type-C Cable 1 x Keycap Puller 1 x User Manual