Sigma USB Dock for Canon Mount Lenses w/Lens Pouch and Camera Cleaning Set KIT INCLUDES: Sigma 878 USB Dock Lens Firmware + Altura Photo Lens Pouch + Altura Photo Cleaning Kit + MagicFiber Microfiber Cleaning Cloth. SIGMA Optimization Pro software in order to connect a photographers lens to their personal computer to update firmware and other parameters such as focus, and for the Sports category. THE SIGMA USB DOCK is only compatible with the Sigma Art, Contemporary, and Sports line lenses (Sigma Global Vision lenses). COMPATIBLE with: 24mm F1.4 DG HSM, 35mm F1.4 DG HSM, 50mm F1.4 DG HSM, 150-600mm F5-6.3 DG OS HSM (S and C), 18-35mm F1.8 DC HSM, 30mm F1.4 DC DN, 50-100mm F1.8 DC HSM, 85mm F1.4 DG HSM, 14MM F/1.8 DG HSM, 135MM F/1.8 DG HSM, 24-70MM F/2.8 DG OS HSM, 100-400MM F/5-6.3 DG OS HSM and 18-300mm F3.5-6.3 DC MACRO OS HSM. SIGMA AUTHORIZED DEALER. Includes Sigma USA 4-Year Warranty.