Makita's 18V LXT Lithium-Ion Cordless 8 Ft. Concrete Vibrator (model XVR02Z, tool only) delivers more run time with maximum vibrations per minute(VPM) for strengthening concrete or when running a corded tool is not an option. The XVR02Z weighs just 11.4 lbs. (with battery, sold separately) with high vibration and ergonomic features for top performance. For improved tool performance and extended battery life, Makita created Star Protection Computer Controls. Star Protection is communication technology that allows the Star Protection-equipped tool and battery to exchange data in real time and monitor conditions during use to protect against overloading, over-discharging and overheating. For increased versatility, the tool can also be powered by Makita 18V LXT and Compact Lithium-Ion batteries with the star symbol on the battery indicating Star Protection inside.