The Dewalt DCE531 concrete vibrator is light and compact, therefore, suitable for single person use The DCE531 is designed to improve the strength and consistency of wet concrete by removing air bubbles from the mix before it hardens. It is part of the Dewalt XR cordless platform, it can be used with 18V XR batteries as well as the larger XR Flexvolt batteries which can enable greater runtimes if required. Features: Shaft length 1.2m Sealed motor and driveshaft for improved durability Light and compact, suitable for single person operation Tool-free locking nut allows easy removal of shaft for transportation Vibrating poker removes air from concrete forms to strengthen concrete and improve consistency of mix Specification: Shaft Length: 1.2 m Sound Power: 87 dB(A) Head Diameter: 28.6 mm Power Output: 360 Watts Sound Pressure: 75 dB(A) Hand/Arm Vibration: 2.8 m/s2 Vibrations/minute: 15,000 VPM Vibration / Uncertainty: 1.6 m/s² Sound Power Uncertainty: 5 dB(A) Sound Pressure Uncertainty: 5 dB(A)