![]() There is a Pair button on the receiver screen, so you add more Unifying devices, and an Unpair button on the screen for each currently paired device. This is a purely mechanical switch, it does not send any code to the computer when it is pressed. I am completely baffled by this, so if anyone knows anything else about it, feel free to enlighten me.įinally, there is a button on the top/center which switches the scroll wheel between click-step and free-spin mode. According to xev it doesn't send a mouse button code, it sends some kind of key press events. ![]() It is not marked or identified on the surface of the mouse in any way, and I can't find any mention of it in the (very sparse) documentation included with the mouse or on the Logitech support web site. In addition to these, there is a button lurking under the surface in the thumb area, below the Forward/Back buttons. The following table describes the buttons and the button-codes they send to Linux. The M720 has a LOT of buttons (at least 9, maybe 10 or even 11 depending on how you count them). It seems like there is a very small delay, less than one second, while the protocol changes and then everything works completely normally again. I can set the mouse to channel 1 and use it normally, then press the Toggle button and change to channel 2, and continue using the mouse normally. I have the M720 paired with the Unifying receiver on channel 1, and also paired with the same system via Bluetooth on channel 2. Here's a good example of what I mean by that. If you switch to a channel which has a connection configured but the receiving device is not present, the number on the mouse will blink slowly for a few seconds. The mouse doesn't seem to spend much time synchronizing each time it switches. Once you have set up connections, stepping through them using the Toggle button is smooth and easy. To establish a connection, simply click the Easy-switch Toggle button (adjacent to the numbers) until the connection number you want is lit, and then press and hold the button for more than 3 seconds (until the number starts to blink rapidly). The best thing about the multi-protocol connectivity is that it's not an either/or mode switch, the three available connections can be any combination of Bluetooth and Unifying. There's a lot to say about this relatively small device, and it's all good. Hands-On: Logitech K380 Compact Multi-Device Bluetooth Keyboard
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