Specifications:O-ring strap suitable most bike cube (12-32mm)4 modes: long bright/slow flashing/fast flashing/strobeGreat for student, baby stroller, jogging, walking, bicycles, car emergency, horse-riding, road emergency & camping, etc.Internal lithium battery, only need about 2 hours to be fully charged while be used for about 12 hours. (Auto cut off when fully charged)Super waterproof, make you riding freely regardless of rain.High brightness and energy saving LED. Type: Bike LightLED Quantity: 5 PcsBrightness: 15 LumensCase Color: redLight Color: RedMounting Placement: Bicycle Seat PostSuitable Tube Diameter: 12mm - 32mm/0.47" - 1.26" (Approx.)Running time:Long Bright: 4 HoursSlow Flash: 10 HoursFast Flash: 12 HoursStrobe: 8 HoursCharging Time: 2 HoursSize: 7.5cm x 3.2cm/2.95" x 1.26" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x 5-LED Bike Light1 x USB Cable1 x Rubber Belt