Zinc alloy structure, efficient conduction: The switch is made from high-purity aluminum to ensure low resistance and minimal power loss. The metal housing effectively dissipates heat to ensure long-term stable operation. 12/24V dual voltage compatible: Suitable for 12V and 24V battery systems, ideal for cars, trucks, RVs, boats, and other vehicles. It can disconnect the negative power supply to prevent battery drain during idle periods. Negative terminal disconnect function, safe and convenient: Compared to positive terminal disconnection, breaking the negative circuit reduces the risk of short circuits and enhances safety. The manual knob allows tool-free operation. Compact PCB design, saving installation space: Small size fits easily into tight spaces such as battery compartments or trunks. Standard terminals support series or parallel wiring for flexible installation options. Professional battery management, extends battery life: Completely cuts off parasitic draw from standby electronics like clocks and alarms, minimizing battery dischargeideal for vehicles in long-term storage. Product Contents: 1 x Car Battery Disconnect Switch Note: Due to differences in lighting and screen settings, the item's color may vary slightly from images. Slight dimensional variations may occur due to manual measurement.