Feature: BT Wired Mode. With BT connection, free yourself from twisting cables and enjoy the simple moment. Besides, you can use Type-C cable to connect the devices when it is in low battery. Multiponit pairing. You can connect to three BT devices at the same time, while you need to press Fn #43; Q/W/E to switch devices to receive the input form the target device. 18 RGB backlit effects. You can change brightness, speed and lighting effects to bring yourself more into the game. Besides, it also enables you to see the characters on the key caps more clearly when in the dark. Compact keyboard design. With only 64 keys, it performs the functions of 104 keys. Not only dose it save your space on your table, but also meets your needs. Auto sleep mode. With this design, it will go into the sleep mode automatically when not be using, more power saving and less times charging. N-key Rollover. With this design, the great responsiveness will help you a lot in an intense game and offer you a immersive experience for gaming. Brown Switches. They produce a slight bump and a moderate amount of noise, which will limit input errors and makes them a perfect choice for typing and programming. Specification: Key quantity: 64 Color: Black/ White (Optional) Switch: Blue/ Red/ Brown switches (Optional) Working time: 10hrs System supported: Windows xp/ 7/8/9/10/iOS/Mac OS/Android Item size: 293*102*40mm/ 11.54* 4.02* 1.57in Item weight: 550g/ 19.4oz Package size: 328*143*48mm/ 12.91* 5.63* 1.89in Package weight: 730g/ 25.75oz Packing list: 1 * Keyboard 1 * Type-C cable 1 * User manual