Description: 【Function】 Battery Disconnect Switch prevents battery drain by cutting off power when the vehicle is idle, stopping alarms or electronics from depleting the battery 【Features】Cut Off/Shut Off Switch extends battery life by minimizing self-discharge and preserving charge, reducing the need for frequent replacements 【Compatible】Compatible with 12V/24V systems, suitable for cars, trucks, Rv, boats, and other vehicles with similar voltage requirements 【Easy Use】Easy to install and operate with an included small wrench switch for manual or automatic power disconnection 【Details】Compact and sturdy copper plastic construction (4.09inchx1.26inch), designed to fit tight engine spaces reliably Specification: 10.4cmx3.2cm/4.09inchx1.26inch Package Includes: 1 Battery Disconnect Switch 1 Small Wrench Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.