1Mechanical axis is sensitive to trigger, and a variety of axis bodies provide different percussive feel. 2Builtin 1000 mAh large capacity lithium battery, long battery life, can be used for a long time. 3Made of highquality PBT material, pudding keycaps, translucent design, brighter lighting effects. 4BT 5.0 wireless transmission, stable data transmission, seamless switching of physical buttons for use in different scenarios. 512 kinds of lighting effects can be switched at will, and the life of the contact is 50 million times, bringing you a better experience. Item Type: Mechanical Keyboard Product Model: SKT61 Keys: 61 Keys Contact Life: 50 Million Times Cable Length: Approx. 1.6m / 1.7yd, Type C Cable Wireless: BT 5.0 Built-In Lithium Battery Capacity: 1000mAH (Inclusive) System Requirements: For Windows2000 / XP / VISTA / 7 / 8 / 10 / Linux / OS X 1 x Mechanical Keyboard 1 x Data Line 1 x User Manual with builtin battery.