The Logitech K810 is a compact QWERTY keyboard with six lines that supports Windows 7 and above, Android and Apple iOS. Multi-device keyboards are more luxurious than necessity, but if you are so inclined, they can save you a kindergarten and mobile phone nursery. This is no small matter if you routinely work with longer e-mails and documents on the go.
Logitech clearly believes that you will use it mainly with two mobile operating systems because the K810 has been designed so slim and light enough to slip into a laptop bag or purse bag. With its brushed aluminum finish and laser buttons, it's modern enough to be used with the latest mobile devices.
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You can pair up to three devices at the same time. The procedure is simple: Press the button to connect to the Bluetooth network – weirdly embedded in the bottom of the keyboard – which activates three Bluetooth keys in the function line. Click one of these, then follow the instructions for pairing with your computer, tablet, or phone. To switch between connected devices, just press the Bluetooth button associated with this device.
Typing on the K810 is comfortable. The buttons are sensitive and quiet, their concave surface and rounded corners allow for easy movement of the fingers between them. There is a dedicated Windows key, where you can find it on your computer keyboard, which will take you directly to the Windows Start menu.
The backlight of the keyboard triggers the built-in motion sensor. As your hands approach your keyboard, the keys will light up to help them read in low light. The backlight is automatically adjusted depending on the amount of light in the room or you can manually adjust it up or down using the F5 and F6 keys.
For whatever you like about the K810, there are a few shortcomings. Most importantly, it achieves most of its portability by dropping the numeric keypad. If your work involves a lot of crunching, it's probably a non-starter for you.
I was greatly disturbed by the absence of a cradle or other way of supporting mobile devices while typing them. This is something that Logitech has included with the K780 keyboard and keyboards of the keyboard "Keys-To-Go," among others, so its omission here is confusing. I had to back up the mobile device against the book or some other object to make the display visible when typing on a keyboard – that's a hassle.
However, the K810 is a solid wireless keyboard for heavy users of multiple devices. If you are someone who pipes more email than your office, your thumb will thank you.