For cars; Hyundai Auto Shutdown Circuit Breaker Engine Start-Stop For 2015 Tucson-2018, For 2019 Tucson-2020 Packing: 1 * Cable Start Stop, 1 * Tool 6 Hazards of Unclosed Start And Stop: 1. Frequent engine starting and stopping during traffic jams or at red lights may cause engine wear. 2. Frequent starting and stopping can significantly impact the battery, reducing battery life. 3. Damage to the car's electrical system due to repeated starting cycles. 4. Reduced spark plug lifespan caused by frequent engine starts and stops. 5. Increased oil consumption due to higher oil drainage and quality demands during start-stop cycles, raising vehicle operating costs. 6. Manual shutdown buttons can be easily damaged; forgetting to turn off manually adds inconvenience and may wear out ignition keys over time. Basic Function: 1. Protects the engine by automatically disabling the start-stop function after ignition, effectively preventing damage from frequent engine cycling. 2. Automatically turns off the original vehicle start-stop feature when the car is started, eliminating the need for manual intervention.