High density nylon webbing + TPU (material through the SGS, FDA testing standards) + electronic components (PCB + Phi 5 high brightness light bead + 2 single CR2016 button cell) [product description] the conventional functions as a key switch to achieve LED flash, slow flash, long light, put out, 4 functions. Can remove the internal components of the cleaning jacket, also can replace the battery. The product can be directly printed in logo or sewn label.