【IMPROVE YOUR SAFETY】The rear light can be tied on the bike seat back, backpack as a warning tail light, help other riders, drivers, and walkers spot you, to improve visibility and safety in dark or night. 【WATERPROOF AND DURABLE】This bike tail light is made of waterproof silicone. Size: 6 x 3.5cm, easily carry. Power: 1*CR2032 button battery(included). Flexible, durable, crush-proof, shockproof. Can be used in rainy and snow day, or other bad weather 【 EASY TO INSTALL】No tools are needed. Press the switch to turn it on. With 3 light modes: Constant light, Slow flashing or Fast flashing. You can be easily seen in fog, dusk, night, and dawn. 【WIDE APPLICATION】The bicycle back lights are suitable for MTB, battery bike, racing bike folding bike, motorcycle, or backpack, camping, hiking, room, party and decorations.Small LED tent rope hanging light. 【PACKAGE INCLUDES 】4 x LED Bright Hanging Design Bike Rear Light. Easy storage. Perfect for kids, boys, girls, teenagers, and adults on Birthdays, and many occasions. Let you and your bike more Daz.