It is a marker light that is equipped with a total of 7 emission modes including a constant light and 6 types of blinking patterns, making it ideal for night outdoors.The lighting method changes each time the button on the back is pressed.If the light emission modes are aligned with each other, it is possible to recognize the position of each other in the darkness such as night roads, mountain climbing, and night fishing.In addition to a clip that can be attached to a hat, a carabiner that is convenient to carry is attached, making it convenient to carry.You can also use the standard mount to attach it to the handlebars of your bicycle. Continuous lighting time ; About 55 hours.Splashproof.Brightness : About 3.5 lumens.Irradiation distance : About 1.6km.Light source used.Red LED light x 5.Battery used : 2 AAA alkaline batteries (sold separately)