Features： 1、Intelligent accelerometer accurately warns other road users by enhancing the light. 2、Three adjustment modes, the switch presses the button, long press can be turned on or off, quickly press twice can change to flashing mode. 3、The detachable mounting bracket can rotate 360 degrees and easy to use in a bicycle bag or backpack. 4、Good LED light effect, has bright light, the warning effect. 5、Small in size and light in weight, suitable for use when riding and convenient for outdoor warning. Specification： Item Type: Cycling Light Mode: 3 modes (standard, high, overspeed) Charging Time: About 2 Hours Charging: USB Charging Protection Level: IPX8 Material: ABS Optional Color: Red shell red light / white shell red light Net Weight: About 31.5g Installation Accessories: 12-32mm Tube Application: Bicycle, mountain bike, road bike Switch Press Button: Long press to turn on or off Short press to switch between the three modes Press twice quickly to change to flashing mode Package List： 1 x Bicycle Taillight 1 x Mounting Bracket 1 x USB Line