You can switch at will between formal installation/hoisting with only one bracket, which can meet your different needs. 1000 lumens high brightness and wide angle design ensures excellent lighting effect. And the USB rechargeable design is very convenient for you to charge in at outdoor. It is made of good aluminum alloy and PC material. The length of this product is 11.2cm and width is 3.8cm. It is suitable for outdoor riding. Item Name: Bicycle Light Material: Aluminum Alloy, PC Brightness: 1000LM Battery: 4500mAh (Battery Included) Charging Input: 5V-2A (MAX) External Output: 5V-2A (MAX) Waterproof Grade: IPX5 Features: High Brightness, Temperature Control, Smart Start Stop Specification A (Handlebar Installation), B (Handlebar Installation and Hanging Bracket) Size Details: Length: 11.2cm/4.41" (Approx.) Width: 3.8cm/1.5" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bicycle Light (Style A) 1 x Data Cable 1 x Hexagon Wrench 1 x Fixing Seat 1 x Washer or 1 x Bicycle Light (Style B) 1 x Data Cable 1 x Ceiling Bracket 1 x Fixing Bolt