Provide you a protection of safety from back.<br>This bicycle lights not only illuminate your way in the dim light， but also can do as warning light for passing cars or pedestrian. It can be placed on the tail and the seat tube， used as a warning light. The plastic plate of tail light does not light， not only serves as an ornament， but also becomes a reflector， which is composed of many corner reflectors. Fired from any angle of light on its surface， it can reflect light. And the red light is the most eye-catching during the day， and provides a warning to approaching cars. The light can be reflected to the car when the car lights shine on the taillights， no matter the incident direction， and the light intensity is much larger than the general diffuse light， the  protection of your security!                                    Features                New and high quality<br>    Easy installation<br>    With waterproof design<br>    Directly to the card slot on the wire can be installed successfully<br>    Streamline shape， stylish appearance<br>    Fixed seat easy for dismantled<br>    Low heat generating， no UV or IR light radiation<br>    Energy - saving and environmentally friendly， high brightness<br>    Seismic， impact resistance， non - thermal radiation， safe and stable， reliable<br>                                                            Specifications                        Laser Power     芒鈥奥?5mW    <br>          Electrical Lifespan     8000hours    <br>          Input Power     100mW    <br>          Rated Voltage     3V DC    <br>          Woking Time     9 - 36hours    <br>          Materials     ABS， PMMA， nylon    <br>          Working Temperature     - 5芒鈥炂?- 40芒鈥炂?/td><br>          Work Humidity     0% - 90%    <br>          Suitable for Stem Diameter     20mm - 36mm    <br>          Battery     2 x AAA (not included)    <br>          Color     Red    <br>          Dimensions     7.5 x 6.5cm / 2.95" x 2.56" (L x W)    <br>          Weight     86g / 3.03oz    <br>                                                             Package Includes                1 x Letdooo Bicycle Parallel Lines Type Laser Tail Lights (2*AAA) <br>    1 x Clamp<br>