The Sigma UD-11 USB Dock for Canon EF-M allows you to adjust and update certain Sigma L Mount Lenses (list provided below, in features).

When used in conjunction with Sigma’s Optimisation Pro Software the Sigma UD-11 USB Dock for Canon EF-M is useful for ensuring your compatible Sigma Canon EF-M lens is up to date with firmware. Furthermore, you can also adjust the amount of focus movement and MF timing when operating the focus ring.