EF Mount Teleconverter 2.0x Magnification Factor. Microcomputer Controlled Communication Between Lens & Camera. Spectra Coating Reduces Ghosting/ Flare Protective Fluorine Coating. Dust and Water Resistant Compatible with Select EF Mount Lenses. 1 x Canon Extender EF 2X III 1 x 1 Year Extended Warranty 1 x Cleaning Kit