Built-in 350mAh polymer lithium battery, USB fast charge, multiple charging methods to choose from<br> Strong waterproof, no fear of wind and rain, normal lighting in heavy rain<br> 6 modes: strong light, medium light, low light, slow flash, fast flash, burst flash<br> One lamp has multiple functions, amazing multiple functions<br> Specifications:<br> Product Name: Multifunctional Bicycle Warning Tail Light<br> Battery: 500mah built-in lithium battery<br> Charging: USB direct charging<br> Duration: 3 hours<br> Discharge: 6 hours<br> Mode: Six-speed mode<br> Weight: 20 grams<br> Shell: ABS engineering plastic outer yellow<br> Style: red light / white light<br> Size: about 3*2cm<br> Package Included:<br> 1*warning taillight<br> Notes:<br> 1. Do not charge over 5 V/1A to prevent battery damage<br> 2. Do not look at or shine the light directly in eyes.<br> 3. Keep away from children.<br> 4. Do not use in water for long time.<br> 5.We have an exclusive patent, please confirm the authentic purchase, quality assurance