The M18� 5� Random Orbit Sander delivers corded power with 12,000 Max OPM output. The 7,000-12,000 variable speed dial allows the user more control over the output of the tool to match the orbit speed for the application. The tool�s powerful motor allows the user to remove more material per battery charge. The M18� Random Orbit Sander powered by REDLITHIUM� battery technology delivers up to 35 minutes of run-time on a M18� 3.0Ah Battery Pack (Battery Sold Seperately).