Features: 12V Battery Undervoltage Controller: This is a 12V battery undervoltage controller designed to provide undervoltage protection for 12V batteries. Set an undervoltage threshold and a startup voltage. When the battery voltage drops below the undervoltage threshold, the module automatically disconnects the load; when the battery voltage rises above the startup value, the module reconnects the load. Includes a memory retention function. Features a digital display for real-time voltage monitoring. Equipped with undervoltage setting and startup setting buttons for easy operation. Includes a delay function: the load disconnects only after the voltage remains below the undervoltage threshold for 6 seconds, preventing false disconnections. Specifications: Product Name: 12V Battery Controller Power: 20A relay Dimensions: 82x42mm Installation Size: 94mm Operating Temperature: -25℃ ~ 85℃ Operating Humidity: 5%~95% RH Note: Please allow 1-2cm measurement deviation due to manual measuring. Due to differences between monitors and lighting effects, the actual item color may vary slightly from the images shown. Thank you! Package Includes: 1 x Battery Controller