I bought Logitech’s K580, the white version. K580 is very light and thin. It can easily connect two devices by switching between F11 and F12 keys, and can also support Bluetooth to control mobile phone input. The mobile phone can be placed in the front card slot particularly conveniently.
The K580 has a matte feel, and the button damping is not very strong, and you will not feel tired of your fingers after using it for a long time. The sound is relatively small, suitable for people like me who don’t like to disturb other people in the office, and certainly don’t like being disturbed by others.
Jason 
Tech Elucidations 