Makita's LXT Lithium Ion BVR850 8-foot Cordless Vibrator will make a concrete contractor's day. With run times up to 30 minutes under load on a single charge, there is no down time with recharging the batteries. Ergonomic dual position switch is sealed from moisture getting in so at the end of the day it will be able to be sprayed off with water. Submersible with the sealed switch and battery compartment will allow the user to get in those hard to reach places.