Plug and forget nano receiver Logitech advanced 2.4 GHz wireless connectivity Interface: USB receiver.Sensor technology: Advanced optical tracking Supported OS: Windows vista, windows 7 and mac OS X 10.5 or later.3-year limited hardware warranty The item is same,only the logo has been removed with the word "Logitech" . Plug and forget nano receiver Note : In case of Wireless mouse, the USB receiver will be provided inside or along with the mouse Logitech advanced 2.4 GHz wireless connectivity Interface: USB receiver.Sensor technology: Advanced optical tracking Supported OS: Windows vista, windows 7 and mac OS X 10.5 or later.3-year limited hardware warranty For any queries, please call toll free number 1800 572 4730 (9:00am to 6:00pm-Monday to Friday)