Jump starting a vehicle using The Noco Boost GB40 can be done in just 3 simple steps: 1. With the clamp assembly firmly connected to the 12V out port on Boost, attach the clamps to the battery red to positive, black to negative. 2. Power on the unit. The charge LED light will chase and the Boost led will illuminate indicating that Boost has detected the battery and is ready to jump start. 3. Start the vehicle. Once the vehicle is on power off the unit and disconnect the clamps from the battery.