Power Supply Box: Powered by a 50A for Anderson plug, which can be used with an for Anderson harness to draw power from the battery, or can be installed in a car RV. Charging: The car charger function can charge mobile phones, tablet computers and other electronic products, power socket can be used with some car supplies. Voltmeter: The voltmeter can observe the power status in real time. The measuring range of the voltmeter is 530V, with 5V 4.8A USB output, 12V 20A 24V 10A cigarette lighter output. Wide Application: Suitable for outdoor camping battery box, suitable for RV, yacht installation, etc., DC 1224V input voltage is widely used. Overload Protection: The integral aluminum body is sturdy and durable, with independent switch control, and 20A overload protector protection to ensure power supply safety.