An absolute guarantee cannot be given. However, the probability is very high, as the system in use delivers optimum performance.
Comparisons with other devices used on the market (for example, commercially widespread IPL devices) have shown that the procedure with which you are treated automatically adjusts to different skin depths and types, works in exactly right wavelength range and quite significantly with exactly the energy that particularly your skin tolerates very well.
Nevertheless, after years of being hair-free, slightest hair growth may occur again in treated areas. Triggers can be hormone balance disorders or changes in it. Another possibility is growth from hair roots that have never produced hair before (dormant follicles).
A visit to your eden beauty lounge will ensure rapid elimination of newly appearing hair and tiny hairs.