The HM002GZ03 demolition hammer from Makita runs off of 2 x 40V batteries in order to power its extremely efficient brushless motor. It is capable of producing up to 20.9 J of impact energy The Makita HM002GZ03 is an extremely heavy-duty SDS Max demolition hammer from the XGT range. It is powered by 2 x 40V batteries in series and has a fully brushless motor for the highest power output. Other features include its 12 x bit angle settings, XPT protection against water and dust and anti-vibration housing. Connect it to compatible dust extractors for efficient dust control. Features: This extremely powerful brushless SDS Max hammer is powered by two 40Vmax XGT Li-Ion batteries in series Soft start Auto-Start Wireless System (AWS) connects to compatible dust extractors with Bluetooth. The dust extractor automatically runs while the switch is on Constant speed control LED job light \"Soft no-load\" function automatically reduces the motor speed during idling to suppress the vibration of the machine body Anti-vibration housing and AVT for reduced operator fatigue 12 x bit angle settings Slide lever for trigger lock-on/ lock-off Compact design for high portability Variable speed control dial Comes with: Bull point chisel Bit grease Side handle Cloth Carry case Specification: Impact energy: 20.9 J Blows per minute: 950 - 1,900 bpm Speed Control: Variable by Dial Bit Angle Settings: 12 Stage Vibration: Chiselling: 8.0 m/sec² Vibration K factor: 1.5 m/sec² Noise sound pressure: 92 dB(A) Noise sound power: 103 dB(A) Noise K factor: 3 dB(A) Net weight: 12 - 13.3 kg Voltage: 80V (40Vx2) Shank: SDS-MAX