Scrcpy, a tool for displaying and controlling Android devices on a computer, has released version 4.0 with new features such as flex display support, camera torch and zoom control, and aspect ratio locking. The tool allows users to mirror their Android device's screen and control it using their computer's keyboard and mouse. Scrcpy does not require root access or an app installed on the device and works on Linux, Windows, and macOS. The new version also includes various technical fixes and improvements.