☆Logicool Logitech Unifying Wireless USB Receiver - Tested #A ・Connects up to 6 Unifying wireless mice or keyboards ・Functionality confirmed by pairing a M235 mouse via the "Logi Options+" app. ※The app can be downloaded from the manufacturer's website: "Logicool LogiOptions+" ※This is a used item, but its functionality has been confirmed. Please understand this before purchasing.