Product Description Logitech Unifying Receiver RC24-UFPC2 USB Wireless RC24-UFPC windows mac Domestic Genuine Product Purchased in July 2021 I was using it without any problems until just now. Since it is a used item, please refrain from purchasing if you are concerned about minor details. Instant purchase without comment is welcome. * Please refrain from price negotiations. I will block you. * For [Convenience store/ATM payments], please purchase **immediately before** payment. (There have been many people in the past who did not make payments.) * Those who request bulk purchases, please purchase promptly after approval. (I am repacking and waiting for shipping.)