Description: 【Digital Display Switch】: This product features a digital display switch, allowing you to conveniently monitor voltage levels and ensure optimal performance 【Leakage Protection】: Equipped with a leakage protection switch, this device helps prevent electrical leaks, enhancing safety for your vehicle or boat's battery system 【Compatibility and Size】: Designed to fit positive terminals with a diameter of 17-19mm, it is suitable for commonly used large-head batteries with a conical structure 【High Current Rating】: With a rated current of 12V300A and voltage display range from 5-80VCD, this switch is ideal for high-power applications in cars, yachts, and RVs 【Construction】: Made from brass material, the product ensures durability and reliable performance over time. The compact dimensions of 126x54x48mm make it easy to install in various setups Specification: Material: Copper Size Chart: 12.6cmx5.4cmx4.8cm/4.96inchx2.13inchx1.89inch Package Includes: 1x Battery Disconnect Switch Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.