Free Matching: DIY 61-key mechanical keyboard kit, can match any switch and keycap, DIY your favorite keyboard. Switch Hot Swap: Switch hot swap shaft, unique design patent, combined with double-layer thick metal panel, provides longer plug life. ABS Shell: Adopting one-piece ABS shell, strong hardness, sturdy, durable, not easy to damage. Widely Compatible: Compatible with Windows2000, ME, XP, Vista, Win 7, HarmonyOS, Win 8, Win 10, Android, OS X, the keyboard is suitable for any environment, home and office use. Note: When installing the switch, please ensure that the switch pins are not bent. During installation, the hot swap shaft must be inserted vertically. The keyboard does not support wired connection via USB, so the keyboard itself does not contain a USB port. Item Type: 61-key Mechanical Keyboard DIY Kit Material: ABS Connection Method: Supports wireless 2.4g, BT 3.0 5.0, Type C wired Lighting: RGB Multiple lighting modes Key Conflict: No conflict for all keys Battery Capacity: Built-in 1500mah lithium battery (included) Ergonomics: Support Working Voltage: 5V DC Working Current: 300mA (max) Standby Current: 0.5mA Hot Swappable Base: Supports standard height 5 Pin Shaft 3 Pin Shaft Compatible Systems: for Windows2000, ME, XP, Vista, Win 7, HarmonyOS, Win 8, Win 10, Android, OS X