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I have a mouse and keyboard with the Logitech Unifying receiver. I have two of those receivers, one in my desktop and one in my laptop. It is quite a pain to actually unpair and repair the mouse+keyboard from one PC to the other. (I think logitech did this on purpose so you would have to buy a second mouse+keyboard, who knows) .

In any event is there some hardware method of resolving this or some "hack" to be able to easily switch from one unifying receiver to the next quickly?

I have seen some post on superuser regarding softare such as input director or synergy but thought I would see if anyone has hardware solution first.



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Why not just move the receiver between the computers? – Máté Juhász Jul 3 at 17:52
up vote 8 down vote accepted

I'm going to answer no - it is not possible. There appear to be similar questions on Logitech's site so you can search there as well. I suspect the answer is that when you pair, the transceiver and the device exchange several bytes of random data and form a key to both allows the devices to recognize each other and to encrypt their wireless transmission.

The problem is that the transceiver may have the ability to recognize something like 5 devices, but the input devices can only recognize and pair to one transceiver. That's because the transceiver only has to sit there and accept a signal it recognizes, otherwise it is passive. Sit, if you see a signal with the correct encryption and ID, accept input, otherwise ignore.

If you added the ability to have the input devices (mouse, keyboard...) pair to multiple transceivers, you would require some sort of additional buttons on the device to switch between them. You'd also need to have the input device store the state (caps lock, num lock...) it was in for each transceiver.

The only Logitech device that can do this is the new K760 keyboard for bluetooth. None of the Unify devices appear able to do this.

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This sucks, but it's also true. I sell lots of Logitec, and that is one question that always comes up. +1 though – Canadian Luke Aug 8 '12 at 5:54

I had been successfully using a KVM switch to pair 3 unifying devices into one unifying receiver. There are one type of KVM switch technology (USB DDM - Dynamic Device Mapping) can pair multi unifying receivers and share unifying keyboard or mouse to many systems.

Please google "USB DDM KVM switch" and you should can find right KVM switch for your setup.


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Right. If the wireless devices use USB receivers vs Bluetooth (not 100% clear from the description) then a USB KVM switch will likely work. How well it will work is of course a question -- there may be delays when switching back and forth. – Daniel R Hicks Aug 31 '12 at 20:57
I will check that out and post back my thoughts when I get a chance – Kairan Sep 30 '12 at 3:23

Suppose two receivers (eg. installed in a PC and a laptap) could unify successfully and pair with a keyboard - and then the keyboard is "used" while both machines are on and within RF range ...

Or worse, unifying by tripling / quadrupling ... receivers, each installed on a unique host, to a single device which would then be "used" simultaneously by all the hosts, within RF range, that are on ... hmmm ....

Migrating the receiver back and forth between the two machines is easier - after all, it is desired that the big pieces of hardware (K & M) do so (ie. migrate between the machines) and the receiver can be conveniently stored in one of them until reinserted in the target host machine's USB port. However, the anecdote in Logitech unifying reciever no longer works on ALL USB ports and information from USB port may stop working after you remove or insert a USB device implies possible USB connection failure either from mechanical insertion / extraction damage (USB type A duty cycle is approx. 1500 connections ) or transient software malfunction of the receiver's USB registration.

related: How to pair Logitech Unifying devices to more than one transceiver

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This can be achieved easily using a $6 USB manual switcher...That is sharing a single keyboard/Mouse etc via a single Unifying receiver, you need a power USB hub as well

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Download the Unifying software from Logitech & follow the instructions:

I had to replace my Trackball. When I connected it I needed to use both receivers to use the Trackball & the Keyboard, but using this download worked for me. I'm back to only having to use the one.

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I think you misunderstood the question. It's not about how to use two devices with one receiver, but how to use devices with multiple computers smoothly. – Máté Juhász Jul 3 at 17:51

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