Power Supply: BatteryMounting Placement: FrameCertification: NONEFeatures:7 kinds of flash mode: Always bright， flash， slow flash， left to right， right to left and left to right slow flash， flash， flash back and forth2 laser lights remind someone else of keeping distance， add safety!This little laser beam tail light will ensure your safety while riding in the darkness.(Note : Do not look directly at laser lights)Waterproof， safer in water fog when riding in the rainmeets IPX-II grade waterproof standard， tilt 15 degrees raindrops waterproof.Use for jogging， walking， bicycles， car emergency， horse-riding，road emergency & camping， ETC.we recommends using 2pcs No. 7 900mA rechargeable NiMH batteries， it can work 9 hours of continuous functions in the case of fully open.