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 MILWAUKEE M18 REDLITHIUM CP2.0 Battery delivers up to 2X more runtime, 20% more power and 2X more recharges than standard lithium-ion batteries. The lithium-ion battery pack features superior pack construction, electronics, and performance giving you more work per charge and more work over pack life than any battery on the market. The rechargeable battery also offers you 2.0 amp-hours of runtime.