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 + key combination keys and side button. F99 Pro tri-mode connection keyboard can be connected to PC, laptop, tablet, gaming console and mobile phone to meet the needs of work, game and study Hot-Swappable Custom Keyboard: The 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. This F99 Pro silent version mechanical keyboard equipped with pre-lubed quiet switches, brings smooth typing feeling, provides fast response and reduces noise, which make it popular among office workers Gasket-Structure and PCB Single Key Slotting: This computer keyboard features a adv