With 2 programmable keys ML/MR on the back of Nintendo pro controller, each programmable key can be set as up to as a 1-20 buttons combination (A+B+X+Y+D-Pad+L+R+ZL+ZR). All the buttons that can be mapped to enhance game play. Setting complex actions in the ML/MR buttons can help you win the game more easily. Switch Controllers with the programmable button can minimize button abuse and stick clicking. The controller can last more than several years even with heavy use. There are 2 extras back keys (SL/SR ) of nintendo switch pro controller, which means double-click SL/SR, you can turn on/off programmable keys (ML/MR) func to prevent accidentally touching. Our switch pro controller is made of durable & advanced transparent materials. While playing you can see the built-in mechanical components and fluid lines design of switch controller and match them with LED light stripes of different colors to create a cool gaming atmosphere, which provides a stunning look while gaming. The Pro Controller has 3 optional modes (flashing/fixed/off), and controller has an extras light control key on the back, you can choose different light mode or off. In additional to upgrading our controller and features, we have also upgraded our software to support multiple platforms. Our Pro controller is compatible with Android devices, and also available for Stadia/Luna/SteamLink cloud gaming. PC controller (DOES NOT work with Mac OS), works with Windows 7/8/10 via WIRED connection only (compatible with X-Input games ONLY).