The MILWAUKEE M18 5 Random Orbit Sander delivers corded power with 12, 000 Max OPM output. The orbital sander features a 7, 000-12, 000 variable speed dial delivering users with more control over the output of the tool to match the orbit speed for the application. The tool s powerful motor enables users to remove more material per battery charge, increasing their productivity. The cordless orbital sander is powered by the Milwaukee REDLITHIUM battery technology, providing users with up to 35 minutes of run-time on an M18 REDLITHIUM XC3.0Ah Battery Pack (Battery Sold Separately).