This keyboard is characterized by ergonomic gradient keycap, which enables you to type for hours without feeling hand pain.What this keyboard can offer you is USB wired connection and Bluetooth-compatible connection so you can get nice usage experience.Made of high-quality ABS material, it is lightweight and durable to use.The length of this product is 31cm, the width is 12cm, and the height is 3.6cm.It is compatible for Windows, for Mac, for iOS, for Android. And it is the keyboard that is designed with n-key rollover function, which enables multiple keys to work simultaneously to bring you smooth usage experience.Item Name: Mechanical KeyboardMaterial: ABS: AJAZZModel: AK33Color: Black, WhiteStyle: Red SwitchBattery: Built-in 1000mAh Rechargeable Battery (Included)Standby Time: 90 DaysInterface Type: Bluetooth-compatible/USBConnection Distance: about 10 MetersNumber of Keys: 82 KeysKey Life: about 60 Million TimesSupported System: for Windows, for Mac, for iOS, for AndroidFeatures: Quick Response, Dual Modes, 82 KeysSize Details: 31cm x 12cm x 3.6cm/12.2" x 4.72" x 1.42" (Approx.)Notes:Due to the light and the screen setting difference, the item's color may slightly differs from the pictures.Please allow slight dimension difference due to the manual measurement.Package Includes:1 x Mechanical Keyboard1 x User Manual1 x Type-C Cable