This small keyboard adopts PC high-transparency transparent shell and keycap, with transparent glass shaft, which is very cool under the rendering of lights. A great choice for your desktop.The K21 numeric keypad supports three connection modes: Bluetooth/2.4GHz/Type-C wired to meet different usage scenarios. Through Bluetooth mode, multiple devices can be switched freely, adapting to operating systems Windows/Android/IOS/MACOS.The 21-key numeric keyboard has 19 RGB lighting effects, which can be switched at will, and the translucent keycaps allow you to experience the e-sports atmosphere.Full-key hot-swappable design, experience the fun of customization. Supports most 3-pin/5-pin mechanical shafts on the market.The K21 numeric keyboard supports macro settings, and users can customize their personalized keyboard through custom software.Name:K21 three-mode connection hot-swappable numeric keyboardGlow:19 glow effectsConnection :Bluetooth + 2.4G wireless + TYPE-C wiredProduct weight:180GColour:A:Transparent-WhiteMaterial:PCSize:121x83x36.5mmPackage Contents:1 x keyboard1 x data cable1 x key puller2 x shafts1 x USB receiver1 x multilingual instruction manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.