Ceramic bearing. Standard head (18 watts). MULTIflex LUX connection. Push-button autochuck. 4-port spray. Third-generation cellular optics with a 5-year warranty. Use at minimum air pressure of 36 psi (2.5 bar). 380,000 rpm. 2-year warranty. 2-1/2-year warranty if maintained with KaVo's QUATTROcare Plus.