A. It is easy to install and has a wide field of view. B. It has a waterproof function for daily use. The maximum noise can reach 110 decibels, and the sound is clearly audible. C. It features bright LED lights with relatively high illumination and can be seen from a long distance. The lights have a built - in battery and support USB charging. D. It has a relatively sturdy structure, made of certain materials and components, with stable performance and relatively long - lasting durability. E. It combines the functions of a bicycle taillight and an anti - theft alarm, which is convenient to use. Product Name: Bicycle Alarm Taillight Charging Method: USB charging Wireless Range: 30 - 60 meters Light Modes: 6 types Sound Volume: 110 decibels Waterproof Function: Yes Operating Frequency: 433.92 MHz Remote Control Battery: CR2032 button battery (included) Bicycle Alarm Taillight Battery: 18650 lithium battery (included) Material: ABS Color: Black Package Contents: 1. One taillight 2. One remote control Only the above items are included in the package, and no other products are included. Note: Light reflection and different displays may cause slight differences between the item color and the actual object. A measurement error of plus or minus 1 - 3 centimeters is allowed.