Features: Brand new and high quality 12V Battery Undervoltage Controller: This is a 12V battery undervoltage controller. It mainly performs undervoltage protection for a 12V battery. Set an undervoltage value and a start-up value. When the battery voltage is lower than the undervoltage value, the module will automatically disconnect the load; when the battery is higher than the start-up value, the module will automatically connect the load. It has a memory retention function. It features a digital display showing real-time voltage. It has undervoltage setting and start-up setting buttons, making it easy to use. It has a delay function; the load will disconnect after the voltage is lower than the undervoltage value for 6 seconds to avoid false disconnection. 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 measuring deviation due to manual measurement. Due to the difference between different monitors and the effect of light, the actual color of the item might be slightly different from the color shown on the pictures. Thank you! Package includes: 1 x Battery Controller