Performance Tool self-powered timing lights feature a detachable inductive pick-up that can be easily hooked up. They are designed for all gas engines, outdoor power equipment, motorcycles, snowmobiles, mowers, and tractors. They work with magnetos and are powered by two simple rechargeable or standard D batteries. So, whether you're working on a farm, in a shop, or in your own garage, Performance Tool self-powered timing lights will work on whatever you have.