Choosing a bycicle tail light with flashing modes is essential for cycling at night or in places where visibility are poor, which can greatly increase riding safety. Waterproof silicone shell allows your to ride freely in all weather. Steady on and flashing lighting modes is provided for your options. It can be easily mounted on the bike in seconds. The individual design adds more fun to your riding, this bike light is really a great assistant for mountain bike and road bike cycling enthusiasts. Features - LED light with high brightness, 3 light modes with fast flash, moderate flash and steady on, easy to be noticed at night and area with low visibility. - Easy to mount on your bike seatpost, pole, handlebar and even your helmet, no extra tools are required. - silicone shell provides good shock-proof performance, more reliable and safer. - Life waterproof rate, weatherproof for you to ride freely. - Novelty alien design, make your bike look cool and add more individuality. Specifications - Color: Red. - Material: Silicone and electronic components. - Waterproof: Life waterproof. - Size: Approx. 4 x 5 x 2.8 cm (LxWxH). - Mounting Placement: Seatpost, pole, handlebar, helmet, etc. - Battery: 2 x CR2030 button cells. - LED modes: fast flash, moderate flash, steady on. - Application: Bike / mountain bike.