Jobsites are loud and messy, which is exactly why Milwaukee built this speaker to run on the M12 battery system instead of a fragile power cord. Pull an M12 pack off your drill or driver, drop it in, and you've got Bluetooth audio wherever the work takes you - no outlet required, no cord to trip over or chew through with a saw.At just over 2 lbs and roughly the size of a large water bottle, it's small enough to clip into a truck cab, tuck on a shelf, or set on a workbench without eating up space. The black and red housing matches the rest of the M12 lineup, so it looks at home next to your other cordless gear. Wireless Bluetooth pairing means no wires between it and your phone, either - just pair and go.This is a tool-battery speaker, not a home stereo, so it's built for the realities of a work environment: portable, rugged, and powered by the same batteries you're already charging for your drills and drivers. Bluetooth wireless connectivity Runs on Milwaukee M12 batteries (sold separately) 12-volt power source Compact footprint: 4.25" x 4.65" x 10.5" Lightweight at 2.32 lbs Black/Red M12 finish