Specification: Product Type: Helmet DIY Glow Stripe Sticker Material: PVC Long strip: 32.5cm, short strip: 23cm Power: 2 * AA batteries (not included) Feature: 1. This product is universal for all kinds of motorcycles/Bicycle in the market. 2. Do not hurt helmet,use double-sided glue,the residual gum after tear off is less,a few remain are swabable with cleaner essence can clear clean. 3. Firm,not easy to age,flashing bar is waterproof. 4. 3 Modes: Always On,Flash,Fase Flash.Can be switched via the controller. Package Included: 4PCS of helmet light bar 1 x extension cord 1 x Connection Harness 1 x Battery Box (battery not included) Note: 1.Due to different lighting and screen settings, the color of the item may be slightly different from the picture. 2.Please allow for slight size differences due to manual measurements.