RightBearing Cycling Bicycle Bike Flash Taillights Safety Alarm with 2 Modes (Laser Lines and Flash) t12 2 laser lights keep safety 3 flash modes, slow, fast and always flash Working: 9-36 hours depends on the batteries Waterproof, safer in water fog when riding in the rain Use for jogging, walking, bicycles, car emergency, horse-riding, road emergency & camping, etc.