Multi-Device ConnectionAULA F99 wireless mechanical keyboard provides three connection methods, including BT5.0, 2.4GHz wireless mode, and USB C wired mode. It can be connected to up to five devices at the same time, and switch between them easily by FN+ combination keys. No limits about your keyboard connection to meet the needs of work, gaming, and study. Hot-swappable Custom KeyboardThe switches and keycaps can be freely replaced(keycap/switch puller are included in the package).This customizable keyboard with hot-swap PCB allows users to replace 3 pins/5 pins switches easily without soldering issue. F99 mechanical keyboards equipped with pre-lubed linear switches, bring smooth typing feeling and pleasant typing sound, provide fast response for exciting game. Mechanical Gaming KeyboardF99 is a premium mechanical keyboard for both work and game. With 16 RGB lighting effect to adds a great atmosphere to the game room.