The vibrating tile setter helps spread the adhesive evenly, no more air bubbles or unevenness. Your tiles will lay perfectly flat. Powered by a 16.8 volt lithium battery, you'll have enough power to work for a long time, and the battery indicator light will tell you when it's time to replace the battery, it only takes 2 hours to charge the battery.  Two batteries are included at once, you will be able to work without interruption by simply changing batteries. The suction cup has a maximum lifting capacity of 77 pounds, you can easily lift and move even large and heavy materials. For those who love precision, there is a built-in bubble level, you will always be sure that the tiles are lying flat. Another handy detail is the flashlight for working in low light.