Letgoing Bike Vintage Old Style Dynamo Generator Headlight Kit with Taillight, Big Power 12V 6W 1. Bike Vintage Old Style Dynamo Generator Headlight Kit with Taillight. 2. Body diameter is 7.5cm and head diameter is 10cm, it's built with metal Aluminum. 3. It have two working styling, one is center big lamp (High beam mode), the other working style is side small light (near light mode). 4. Power is 12V 6W and , have more one set light bulb (one big and one small) in headlight cover for your backup. 5. Delivery time is 8-15days from China to United State.