BESTSUN USB Rechargeable Bicycle Tail Lights Bike Cycling Safety Zone Tail Light 8 LED with 2 Red Safety Lines for Cycling Hiking Super Bright 8 LED Taillight And 2 Laser Safety Warning Line Rechargeable: Built-in Li-ion battery that can be recharged by USB. 1200mAh battery working about 6 hours. The circuit protection,180-degree adjustable bracket,Provides 220 degrees of visibility from up to 1 mile away 3 modes:quick blink, slow blink and continue light. Waterproof, safer in water fog when riding in the rain Kindly Note : Do not look directly at laser lights Use. Great for student,baby stroller,jogging, walking, bicycles, car emergency, horse-riding, road emergency&camping,ETC.