Logitech's current flagship productivity mouse, the MX Master 4, is available for just $102.59 at Lenovo when you stack codes EXTRAFIVE and SUMMERLIVE26 in the shopping cart. This adds a discount of $17.40, bringing the price down from the $119.99 list price and saving you 15% off this amazing mouse. It's not often that we see noticeable price drops on this model, as it's a particularly in-demand peripheral for productivity users. This discount applies to the black version of the MX Master 4. It succeeds the MX Master 3S, which is still our top pick for the best overall wireless mouse . The new MX Master 4 model keeps many existing features from the previous MX Master 3S, including the dual-mode MagSpeed scroll wheel on the top and a horizontal wheel on the side, but adds a brand-new haptic experience. ● Check out this deal on Lenovo The Logitech MX Master 4 uses an 8K DPI sensor, quiet click switches for almost silent operation, and better 2.4GHz wireless connectivity.…