The .rar extension indicates a compressed archive. It will require software like WinRAR, 7-Zip, or The Unarchiver to extract the contents before use. 2. Likely Use Cases (Circa 2015-2016) Unbricking: Restoring a device that won't boot (bootloop).
Always back up current data before attempting to flash new software. To give you a better review, I'd need to know: What specific device (phone, tablet) is this for? Download Flash201512211106 rar
Given the 2015 timestamp, this is likely a flashing tool (like SP Flash Tool or a vendor-specific updater) or stock firmware for an Android device, tablet, or IoT device manufactured around late 2015 or early 2016. Download Flash201512211106 rar