Products DiscriptionSpecifications LED Number: 5 LED lifespan: up to 100000 hours Battery: 2 x AAA LR03 1.5V Battery Dimensions: 8 x 4.8 x 3.8 cm Weight: 146g / 5.15oz Package Includes 1 x Bicycle Light 1 x Screw mounting bracket 2 x Rubber stent patchThere are five high brightness LED lamps with lasting efficiency, stable and waterproof which can be used in the rain. The flash function can be used for warning; therefore, it can bring you night riding with an unparalleled security experience. Its size is 3.8×4.8 ×8 cm while its weight is 0.448 kg. It uses three 7 conventional batteries to provide power. LED lights can be used for up to 100000 hours. There is a warning that it will never look like a straight LED light!Laser lights shine brightly,meanwhile not affected by street lamps,visibility is further than one kilometers. Use 2 x AAA batteries,continuous working time up to 30 hrs(Specifi timing depends on the batteries being used). 180 Degree adjustable bracket,firm and durable,easy to install. DO NOT LOOK DIRECTLY TOWARDS THE LED LIGHTS. DO NOT LET CHILDREN USE IT INDEPENDENTLY