The makita hr009g is a 30mm combination hammer powered by 40v max xgt li-ion battery. Equipped with active feedback sensing technology, the tool will shut down if the rotation speed suddenly slows down for user safety. Featuring auto-start wireless system, this means the hr009g will connect to compatible dust extractors with bluetooth, the dust extractor automatically runs while the switch is on. This machine also comes with interchangeable sds plus and keyless chucks. Features & benefits active feedback sensing technology anti-vibration housing and avt for reduced operator fatigue auto-start wireless system trigger lock function reversing switch variable speed control by trigger and dial constant speed control electric brake anti-restart function torque limiter led worklight with pre-glow and afterglow functions dust collection forced dust collection tool-less bit change chuck type quick change specifications battery type: makita xgt lithium-ion battery voltage: 40v max in steel: 13mm max in wood: 32mm max in concrete: 80mm impact energy: 3.9J shank: sds-plus blows per min: 0 4,000bpm noise sound pressure: 94 db a noise sound power: 105 db a noise k factor: 3 db a no load speed: 0 840rpm vibration k factor: 1.5M sec vibration hammer drilling: 7.3M sec vibration chiselling: 7.1M sec vibration drilling into metal: 2.5M sec contents makita hr009g 40v max xgt cordless sds plus rotary hammer drill drill chuck set grease vessel depth gauge cloth no batteries no charger carry case