Ceramic bearing. Miniature head (15 watts). MULTIflex LUX connection. Push-button autochuck. 3-port spray. Third-generation cellular optics with a 5-year warranty. Use at minimum air pressure of 33 psi (2.3 bar). 420,000 rpm. 2-year warranty, 2-1/2-year warranty if maintained with KaVo's QUATTROcare Plus.