Feature:1. Blue Switch: 83 keys, Blue Switch, can be disassembled at will, allowing you to use your own keyboard at will.2. Brightness Adjustment: Brushed panel, mobile phone tablet bracket, light adjustment rocker, brightness adjustment knob, punk keycap, make your experience different.3. Impact Resistant Material: The retro style round keycaps are made of impact resistant material with high strength and abrasion resistance, and experience the impact of a vintage typewriter.4. Bluetooth 5.0: Bluetooth 5.0 supports 3 devices FN master, which can be operated freely and conveniently in different places at home, school and cafe.5. 2000mA Capacity: 2000mA large capacity built in battery supports wireless use and can last for 16 hours, even if it is charged in the middle, you can use the keyboard at will, supporting systems for Windows, for IOS, for Android.Specification:Item Type: Typewriter Mechanical KeyboardMaterial: ABS, MetalBluetooth version: 5.0Connection Method: Bluetooth or WiredNumber of Keys: 83 Keys (Mechanical Blue Switch)Number of Multimedia Keys: 12Button Life: > 50 Million TimesInterface: Type CConduction Stroke: 1.5 to 2.4mmBattery Type: 2000mAh Li Ion Battery (Built in)Support System: For Windows, for IOS, for Android.Package List:1 x Keyboard2 x Replacement Switch1 x Key Puller1 x Data Cable1 x User ManualNote: