The makita dga901zux2 is a high powered 230mm 9 cordless angle grinder powered by two 18v lithium-ion batteries in series and is also equipped with aws which uses bluetooth technology to communicate between tool and vacuum and enable wireless control when used with makita aws cordless tools. The dga901zux2 comes with a brushless motor, active feedback sensing technology aft as well as automatic torque drive technology adt . There are also battery indicators for over-discharge and overheating protection. Features & benefits soft start brushless motor electronic current limiter for overload protection anti-restart function electric brake active feedback sensing technology automatic torque drive technology ergonomically designed handle with soft grip battery guard large switch lever with lock off function battery indicators for over-discharge and overheating protection specifications battery type: makita lxt lithium-ion voltage: 36v 18v x 2 bore diameter: 22.23Mm max wheel thickness: 6.5Mm max wheel diameter: 230mm no load speed: 6000rpm noise sound pressure: 88db a noise sound power: 99db a noise k factor: 3db a vibration k factor: 1.5M sec vibration surface grinding : 7.5M sec vibration disc sanding : 2.5M sec contents makita dga901zux2 twin 18v lxt cordless brushless angle grinder 230mm no batteries no charger no case side handle lock nut wrench wireless unit