This is a 2-stroke petrol version meaning you need to mix 2-stroke oil with unleaded petrol before use. Unleaded petrol and 2-stroke oil are not provided. You will also need to supply 100ml of chainsaw oil which will keep the chain lubricated for safe and clean cutting. This Challenge 37cc, 40cm petrol chainsaw is easy to start and gives you a powerful tool perfect for tackling any challenging pruning jobs, chopping down trees or logs with ease. With a pull cord ignition, this petrol chainsaw is easy to start. The anti-vibration system minimises vibrations allowing you to work more efficiently and for longer. For your safety, this chainsaw includes a kick back safety brake, anti-vibration sy.