Walmeck -theft Bike Alarm Rear Light Wireless Remote Control Taillight Waterproof Smart Cycling Light

4 switchable modes by pressing buttons on remote controller,or pressing power switch of light. (NOTE: You can not switch modes when alarm is activated.) light will automatically turn on during your braking time,provides more safety during nighttime riding. Built-in light sensor, light will turn off/on light automatically in bright/dark environment.(NOTE: Only for Fast Flash Mode and Breathing Flash Mode.) When bike alarm is activated,it is sensitive to any vibrations, your from thefts. alarm sound can reach up to 108db,loud enough to alert you and thefts.