UK Beauty Machines LS10 Operation Manual page 11

2) Seat the patient in the treatment chair after make him wear the protective
glasses. The operator should also wear protective glasses. The operator then
chooses the best operating position between the treatment range and the
touch control screen.
3) Paste 1-2mm cold gel on the area need treatment, by doing this will help the
skin to remain cool under the laser pulse and increase the rate of the
penetration. The light pulse irradiates on the cold gel, every area that need
light pulse treatment should be pasted by new cold gel.