The new high-quality bicycle lights, lamp beads for high brightnessLED material<br>Rechargeable polymer lithium battery - Luminance: 15LM (low powerconsumption and durable service)<br>USB rechargeable bicycle taillight and auto cut off when fullycharged.<br>O-ring strap suitable most bike cube(12-32mm) ---- Modes: Longbright/Slow flashing/Shun flashing/Strobe<br>Waterproof Usb Rechargeable Flashing Night Rear Tail FlashlightWarning Cycling Bicycle<br>Great for student, baby stroller, jogging, walking, bicycles, caremergency, horse-riding, road emergency&amp;camping, ETC<br>High quality internal lithium battery,only need about 2 hours to befully charged while be used for about 12 hours.<br>Super waterproof,make you riding freely regardless of rain.<br>High brightness and energy saving LED.<br><br>Specifications:<br>1. Mode:4 modes<br>2. Brightness:15 lumens<br>3. Item Color:Black<br>4. LED Light:Red,Blue,White<br>5. Product Weight:60g<br>6. Product Dimension:7.5*3*2cm<br>7. Package Weight:100g<br>8. Mounting Placement:bicycle seat post<br>9. Type:LEDs<br>10. Suitable Tube Diameter:12-32mm<br><br>Running time<br>Long bright: 4 Hours<br>Slow flash: 10 Hours<br>Shun flash: 12 Hours<br>Strobe: 8 Hours<br>The charging time of about 2 hours<br><br>Note:<br>As the tail light is new,maybe have some low battery case. Pleasecharging before using.If this makes some trouble for you,we reallyfeel sorry.<br>