• Insert light head into the curing light handpiece with a twisting motion ， Ensure that both the direct light source head and the light curing host are fully connected to their corresponding positions....
• Insert light head into the curing light handpiece with a twisting motion ， Ensure that both the direct light source head and the light curing host are fully connected to their corresponding positions....
• Insert light head into the curing light handpiece with a twisting motion， Ensure that both the direct light source head and the light curing host are fully connected to their corresponding positions....