It's best to find an after-sales service first and see if it can match.
Either match one yourself, but pay attention to matching. The second generation adapter is compatible with the first generation, and the first generation is not compatible with the second generation. Don't buy it wrong.
Don't worry too much, you won't say you lost it, you can only scrap it.
I just saw a Logitech adapter matching introduction from the Internet and showed it to the landlord:
1. Logitech one-way receiver
You can pair a 1 mouse that supports union technology, but you cannot pair a keyboard.
The mouse models that can be paired are: m950/m905/m705/m525/m515/m51m505/m345/m31m305 (excellent version)/m21m3.
2. Logitech bidirectional receiver
The product is a Logitech keyboard and mouse set receiver, which can be connected with 1 excellent keyboard and 1 excellent mouse.
The mouse models that can be paired are: m950/m905/m705/m525/m515/m51m505/m345/m31m305 (excellent version)/m21m3.
Keyboard models that can be paired are: K800/K750/K520/K350/K340/K320/N305/K270/K230 ... and other products that support joint technology.
Packaging models that can be paired are:
MK 7 10/MK 520/MK 330/MK 270/MK 260/MK 220 .....
3. Logitech 6-channel receiver
You can connect six Logitech keyboards and mice at the same time.
The mouse models that can be paired are: m950/m905/m705/m525/m515/m51m505/m345/m31m305 (excellent version)/m21m3.
Keyboard models that can be paired are: K800/K750/K520/K350/K340/K320/N305/K270/K230 ... and other products that support joint technology.
Packaging models that can be paired are:
Pairable mice before MK 710/MK 520/MK 330/MK 270/MK 260/MK 220 ... All Logitech genuine mice with (Youlian) logo on the bottom cover.
Special note: M2 15 and M305 also have non-linked versions, so this receiver cannot be equipped!