Multi-Device Connection: AULA F99 Pro wireless mechanical keyboard provides three connection methods, including BT5.0, 2.4GHz wireless mode, and USB wired mode. It can be connected to up to five devices at the same time, and switch between them easily by FN and key combination keys and side button. No limits about your keyboard connection to meet the needs of work, gaming, and study Gasket Structure and PCB Single Key Slotting: This computer keyboard features a advanced structure, extended integrated silicone pad, and PCB single key slotting, better optimizes resilience and stability, making the hand feel softer and more elastic. Five layers of filling silencer fills the gap between the PCB, the positioning plate and the shaft,effectively counteracting the cavity noise sound of the shaft hitting the positioning plate, and providing a solid feel Hot-swappable Custom Keyboard: The switches and keycaps can be freely replaced(keycap/switch puller are included in the package).This custo