1.Magnetic Design, Install Easily:Unique magnetic suction installation, just gently stick to complete the installation, even a novice can easily handle. Its strong and stable magnetic suction force is not easy to loosen or fall off in bumpy road conditions, ensuring night riding 2.Intelligent Brake Sensor, multiple light modes:The LED beads of this bike magnetic tail light bring the maximum visibility brightness, and it has 7 light modes, single flash, double flash, strobe, water drop flash, breathing flash, back and forth flash and long light. In addition, it also has a sensitive brake sensor, when detecting a significant reduction in speed, the bicycle light will quickly switch to a high state, maintaining 1.5 seconds to warn the vehicles behind 3.Multi-directional Protection:The long strip with fan-shaped light layout design makes this magnetic tail light has a visual distance of about 200 metres, which allows you to ride ly in the dark night or foggy days. Moreover, it is waterproof, so you don't have to worry about the tail light being damaged by water 4.Dual Mode:The automatic mode can trigger the rear bike light sensor to switch on and off, it will automatically sleep when there is enough light, and will automatically light up when there is not enough light. Taillights do not sleep in manual mode, click the button to switch to blinking mode. Automatically sleeps when parked for 2 minutes and starts automatically after sensing vibration