Logitech USB Receiver M/N: C-U0007 Operation confirmed, but compatibility with devices may vary. This is not a new item. Please purchase if you understand that this is a used item. Anonymous shipping (free shipping) will be used. Shipping will be via Nekopos or Yu-packet Post (mini). I may be slow to respond due to travel or work. Also, shipping may not be possible on weekends, holidays, Golden Week, year-end and New Year holidays, and Obon. Please be aware of this if you are in a hurry. Thank you. (Management number 1)