NEW Specifications:1. Mode:4 modes2. Brightness:15 lumens3. Item Color:red，blue4. LED Light:red，bule5. Product Weight:60g6. Product Dimension:7.5*2*2cm7. Package Weight:50g8. Mounting Placement:bicycle seat post9. Type:LEDs10. Suitable Tube Diameter:12-34mmNote:As the tail light is new，maybe have some low battery case. Please charging before using.If this makes some trouble for you，we really feel sorry.Please long press to on/off.Package includes:1x bicycle light1x USB cable1 x rubber straphttp://contestimg.wish.com/api/image/rating?name=b426702c7b8911e68b9c065f903a9ac5.jpg&w=1000&h=1000&m=0&t=0