I do not advise you to contact this model, do not be fooled by the noiselessness and ergonomics of this model, after a certain time of use, most likely it will break against the wall while no one is sleeping ! Worst model I have come across. Has some pros: 1. Appearance 2. Compactness 3. Quiet LMB and RMB 4. Lack of glow, which is important when the light in the room is turned off With its cons: 1. Catastrophically bad positioning, it is impossible to move the cursor to the desired point, you have to constantly adjust, which takes time and spoils time. There is a desire to throw the mouse at the wall. Below is a test (if a photo uploads) 2. Very loud wheel scrolling. 3. Price-quality.