Parallel bar engine with LED light, parallel bar engine without LED light, but still can generate electricity Product Name: DIY Stryn engine power. This is the dynamics model of the DIY engine in Stryn and has the ability to exercise. You can show off to your children. "Look, I am really great I made it myself " This model is difficult to install. This is a way to train your child's abilities and intelligence. Installation requires patience, patience and patience. Note: 95 percent alcohol, anhydrous, no oil. of use, , gasoline, oil, wine, candles. Note: Drinking yourself needs to be done by yourself. 1. Alcohol more when used. 2. Use 95 percent alcohol 3. Do not add water or fuel. 4. Burn for 2 minutes 5. Do not use , gasoline, light oil, white wine and candles. 6. Rotate the flywheel to help start and then start. 7. Please note that if the belt is too tight, it will affect the rotation of the engine. The engine does not need to add water, and the dry combustion air expands to generate power. Colour:gold Material:Metal Package Contents: 1 x Stirling Balanced Engine Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: 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. Sold by-YJL official store