Type Anywhere in Comfort
The keyboard is a standard QWERTY keyboard layout, easy to use. Scissor-Switch keys provide you with a very comfortable and pleasing typing experience. The perfect design of the keystrokes can reduce the wrong input effectively and make the “press” softer and quicker.

Ergonomic Concave Round Keys
Scissor switch keys construction beneath every key enables nice responsive typing. Concave keys to rest your fingers perfectly and feel every edge of all the letter keys. Convex for Space Bar key gives accurate clear enter operation. Let your thumb have a break.

WIDE COMPATIBILITY
Support most devices with Bluetooth capacity or USB connector. Smartphone & Tablet: iPad 10.5'' iPad 6 2018, iPad 2017 /10.5'', iPad Pro 10.5 iPad Air/ iPad mini/ iPhone Xs/Xr/8/8plus with iOS 5 or later. Surface Pro, Samsung Galaxy Tab, Amazon Kindle Fire HD 10, Samsung note 8, Android tablet with Android 3.2 or later Computer& Smart TV: Dell HP computer with Windows 7/8/10 or later Samsung Smart TV, Apple TV 2nd and 3rd generations only

Strong Bluetooth Connection and stable 2.4G Connection
Bluetooth 5.0 technology provides a cable-free & clutter-free connection, operating distance 10m. 2.G For Desktop PC Laptop without Bluetooth function

Built-in Wide Cradle
A built-in cradle holder keeps your devices in place and at the optimal viewing angle. Just stick them in and get to work! Support up to 10.5in tablets.

Question of tristinedenise: see review below
Answer:
Press F1, the light keeps flashing red, means 2.4G is not connected; if the red flashes once, it means 2.4G is connected
Press F2, the light keeps flashing blue, means that Bluetooth 1 is not connected; if the blue flashes once, it means it is connected
Press F3, the light keeps flashing green, means that Bluetooth 2 is not connected; if the green flashes once, it means it is connceted