Wireless dual mode connection Two modes of USB 2.4GHz and Bluetooth,free choice,not restricted by 2.4GHz wireless connection and Bluetooth wireless dual-mode technology,just lightly press the USB adaptation button or Bluetooth icon button,then quick switch between different connected devices for typing. Perfectly support Windows / Mac / Android / iOS (iPhone and iPad) multiple operating systems,and mobile phones,tablets,computers,etc,and special quick switch buttons are designed for Windows and macOS systems. A scissor foot structure,which makes the button force more average,the fingertip feels more comfortable,and the feedback is clear and powerful when typing. The keyboard is placed on the desk,forming an 8 � angle with the desktop,which effectively reduces finger fatigue for much comfort.