Using the Makita 18V LXT® Cordless 4-Foot Lithium-Ion Concrete Vibrator is easy. First, make sure you have a fully - charged Makita 18V LXT® battery with the star symbol (battery sold separately unless in a kit). Insert the battery into the tool. You can hold the tool in either horizontal or vertical positions thanks to the dual - directional switch. Place the 4 - foot shaft into the concrete. The 13,000 VPM vibrations will help level the concrete and remove air bubbles. For the longest run time, use the highest Amp Hour (Ah) Makita LXT® Battery available. When not in use, keep the tool in a dry place. The protective cover on the switch and battery helps prevent contamination, but still check it regularly. Only use genuine Makita batteries and chargers to avoid damage. Remember, this tool has a 3 - year limited warranty, so take good care of it.