The role of negative ions is to lock the hair scales during the styling process so as to lock in moisture and keep the hair and shiny Reducing the negative ions of the hair bifurcation can neutralize the positive charge in the hair to eliminate the generation of static electricity, effectively reduce the hair rough split and other problems Safe thermostatic hair care 20 seconds fast heating styling without 3D overlapping design of comb teeth anti-scalding comb teeth heat insulation anti-hot comb teeth reduce pulling hair heat insulation protection anti-hot Three levels of intelligent temperature control for different hair types Product parameters Name: Straightening comb : 7.4V Rated power: 35W Charging : TYPE-C Battery capacity: 4000mAh Charging time: 3.5 hours Battery life: 3.5 hours Material: ABS colour: Grey+red Package Contents: 1 x Curling Iron 1 x Type-C Data Cable 1 x english manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.