Bicycle Parts Product Details Brand: Mode: 9 modes Lumen: About 20 lumen Charge: USB Rechargable Battery: Rechargeable lithium battery Waterproof: Daily waterproof, Cant be soaked Size: About 3.1*2*4cm Weight: About 22g Function: Bike bicycle rear light taillight, Helmet Taillight, Bag Warning Light Product Features Durable, Mini portable, USB Rechargeable 9 Modes, Waterproof, Multifunction Real Show Bicycle helmet tail light USB charging Product information 20 lumens high brightness, safe for night riding 9 modes (click the switch to switch modes in turn, long press to turn off the tail light) 1. Always on (100%) for about 3 hours, press the switch button to switch in sequence 2. Always on (70%) for about 3.2h, press the switch button to switch in sequence 3. Strobe mode, about 9h, press the switch button to switch in sequence 4. Slow flash mode, about 56h, press the switch button to switch in sequence 5.SOS mode, about 9h, press the switch button to switch in turn 6. The horse race flashes, about 14 hours, press the switch button to switch in sequence 7. Tai Chi flashes, about 17h, press the switch button to switch in sequence 8. Neon flashing, about 5h, press the switch button to switch in turn 9. Breathing flashes, about 8h, press the switch button to switch in sequence ABS engineering plastic shell, lightweight, durable and corrosion-resistant Small size and light weight USB charging, 220mAh battery Micro USB input About 2h full Red light on the meter is charging, green light means charging is complete Multiple uses Suitable for a variety of helmets, can be used together IP64 grade living waterproof Note: Do not expose to rain or soak in water for a long time Seatpost tail light installation 1. Take out the apron and tail light, and set the direction 2. Snap the apron into the tail light clip 3. After the card number, install the buckle 4. Mount the tail light on the seat tube Helmet tail light installation 1. Tear the short Velcro off the adhesive 2. Stick on both sides of the inside of the helmet 3. The long Velcro is inserted into the clip 4. Insert both ends of the long Velcro into the helmet 5. Stick on both sides of the inside of the helmet 6. Installation is complete