Tail light that automatically lights up with a built-in acceleration sensor. This is a used CATEYE RAPID X2 KINETIC tail light TL-LD710K. The rubber bands used for mounting are stretched as shown in the image, but they are still usable, and new mounting rubber bands are included. - Model: RAPID X2 KINETIC - Battery type: USB rechargeable - Mounting size: #12 - 32mm - Lighting modes: Constant light / Flashing - Battery life: 50 hours (constant light) / 30 hours (flashing)