... Cold and heat-resistant silicone material, it work safely in the temperature scope from minus 40 °C to 220 °CHigh elastic ... - can be installed on the handle, seat risers, fork, after the fork, after the backpack, helmet use Fixed on the helmet in front of ... One-Touch switch design, easy operating Multistage switch mode,press the buttom switch ordinally,both of LED light quick flashing simultaneously ...