DescriptionSpecially designed for the vocational rider or casual cyclist. Simple to use, long lasting, and safety attached. Easy mount and release , installed in seconds before you get ready to ride. Be seen while riding your Bike, this LED light is the perfect solution for night-time safety when biking.Features -Color: Silver -Material: Plastic -Size: About 10.6x10.6x2cm / 4.17x4.17x0.79in- Simple installation does not affect the center of gravity: more than 95% of conventional spokesare common to bikes.- Equipped with 550mHA lithium battery for long battery life, the battery life is up to 5-20 hours.- IP 65 waterproof function: use as usual in rainy days.- No requirement: It is as dazzling as it stops, and it will show a bright light after turning it on.- USB rechargeable, easy to recharge via power bank, computer, phone charger.Specification- Battery: 550mAH lithium battery- Lamp beads: 7 RBG LED- Waterproof rating: IP65- Life time: 5-20 hoursPacking list: 1 x Bike Hub light1 x Internal 6-point screw1 x rubber pad1 x special screwdriver1 x USB charging cable