The Makita BVR850Z is a 18V LXT Lithium-Ion Cordless 8 Ft. Concrete Vibrator - Tool Only. The Makita built motor produces 13000 VPM to help increase strength of concrete. The Makita BVR850Z vibrator has a compact design at only 105-1/2 inch long and weighs only 11.7 lbs for less operator fatigue. The ergonomic dual directional switch on the Makita BVR850Z conveniently holds the tool either horizontal or in vertical positions. The LXT Lithium-Ion provides longer run time, 5x lower self-discharge (for use any time) and 16 firm holding contact terminals (for constant high power). The Makita BVR850Zs 45-minute Optimum Charger and battery communicates throughout the charging process using the built-in chip in the battery and built-in CPU chip in the charger. The Charger also uses Active 3 Control for current control, thermal control & voltage control.