Do similar USB mice have exactly the same USB transceiver?

There's a pairing protocol:

Theo

Your new mouse will work with your existing USB receiver, and with most other Logitech mice and keyboards. That's why they, Logitech, call it a universal adapter. If you'd changed to one of Logitech's latest MX devices, though, you'd have to use the Logi Bolt USB adapter supplied with it, because they don't work with the universal adapters. DAMHIKT. (Logitech have developed a Bluetooth modification that has increased/improved security.)

Ottavio Caruso snipped-for-privacy@yahoo.com wrote

Yes they do and I have used the same dongle for something like 10 different Logitech model USB tx/receiver, because they all eventually fail due to the s***ty little left button microswitch and I have had them all replaced for free under warranty

Its not that hard to replace the microswitch but I can't be arsed to bother since the replacement is free, even if they can't actually send me a new mouse because they don't make it anymore so they have to give me a full refund and I buy the replacement on ebay etc

Up to a couple of years ago Logitech called the USB dongle a "unifying receiver" but due to insecurities in the protocol, their newer mice/keyboards use a "bolt receiver", which is not compatible with the older unifying receivers.

Instead, it comes with a pre-paired CU0019 receiver that, it turns out, is based on a fairly obscure TC32 chipset by Telink"

But really, only testing it for yourself, will indicate how it works.

When your new mouse shows up, check for its pre-paired receiver plugged into the storage bay on the mouse.

Paul

The new bolt receivers (based on bluetooth) have a green hexagon with lightning icon

The unifying receivers have a red star icon

If it has no icon, it's a generic 2.4GHz receiver

Sadly this is normally the case IME

"Logitech keyboards and mice vulnerable to extensive cyber attacks"

"Several Logitech keyboards, mice and wireless presenters suffer from security vulnerabilities, Not only can attackers eavesdrop on keystrokes, they can even infect the host system."

Thomas Prufer

Not from 200 meters away...