1. Free DIY: This mechanical keyboard kit adopts switch hot swap switch bed that allows you to DIY your favorite switch and keycaps. Specification: Item Type: Mechanical Keyboard Kit Material: ABS Key Configuration: 64 Keys Battery Type: Requires 2 x AAA Batteries (Battery Not Included) Connection: Wireless 2.4G and BT 5.0 Connection Hot Swap Switch Base: Support Standard Height 5 Pin Switch and 3 Pin Switch System Requirements: 2.4G Mode: Suitable for Win XP, for Vista, for Win 7, for Win 8, for Win 10, for OS X BT Mode: Suitable for Win 8, for Win 10(Not Compatible with Win 7 or Lower System) How to Use: Insert the prepared shaft into the corresponding key position, and then install 2 AAA batteries. The USB adapter is in the back cover of the battery, take it out and insert it into the USB port of the computer, please refer to the manual for the specific operation! Package List: 1 xMechanical Keyboard Kit 1 x Adapter 1 x User ManualMechanical Keyboard Kit Widely Cfor OMPatible: The 2.4G Mode Is Suitable For Win Xp, For Vista, For Win 7, For Win 8, For Win 10, For Os X. The Bt Mode Is Suitable For Win 8, For Win 10(Not Cfor OMPatible With Win 7 Or Lower System). Mechanical Keyboard Kit Free Diy: This Mechanical Keyboard Kit Adopts Switch Hot Swap Switch Bed That Allows You To Diy Your Favorite Switch And Keycaps. Mechanical Keyboard Kit Switch Hot Swap: This Custom Gaming Keyboard Features Switch Hot Swap, for INTEGRAting With Two Layer Thickened Printed Circuit Board Panel, Long Service Life. Mechanical Keyboard Kit High Hardness: This Modular Mechanical Keyboard Adopts Abs Shell That Ensures High Hardness, Metal Positioning Plate, Interlayer Sound Insulation Silicone, Bottom Silencer Cotton. Mechanical Keyboard Kit 65% Layout: This Custom Mechanical Keyboard Adopts 65 Percent Layout, And It Does Not Support Cable Connection Via Usb, So The Keyboard Itself Does Not Include A Usb Port.