Our handpiece is almost never damaged.1.The unique 1500W diode laser machine in the world, using dual DC brushless water pump. 2.Large radiator to provide superior heat dissipation for the whole machine and handpiece. 3.American coherent imported laser bar. 4.Professional laser power supply. 5.Laser-specific ultrapure water filter. 6.The ultra-pure water filter is externally easy to replace, and the software will automatically remind you to replace the filter.