Note:This product only supports connect Utility . Unifying does not work. 1PC original new usb receiver for logitech mk270/mk260/mk220/mk345/mk240/m275/m210/m212/m150 mouse keyboard receiver Dual channel, Can also connect the keyboard and mouse Note: The SN code indicates that the production date is 13 years for 2013 years, and only 2013 years after the production of the 14 15 16 17 18 19 mouse and keyboard can be used. S / N code in the battery warehouse, please open your battery box check it. Compatible with:logitech MK220, MK235, MK240, MK260, MK270, MK275, MK345 and other wireless mouse and keyboard sets and supporting M150, M210, M212, M170 and other mouse models; M238, M220 and other single mouse Note: MK220, Mk240, MK260, Mk270 mouse and keyboard sets have a new version and the old version of the distinction, this receiver is only suitable for the new label number SN14/15/16, etc. (before 13) Specifications: Color: Nano small receiver Material: Plastic Quantity: 1PC Package includes: (Without retail package) 1 x Usb Receiver