1. The power supply is powered by a 50A plug. Users can use the wiring harness to draw power from the battery or outdoor power box, or it can be installed in a car or RV. 2: Product application scenarios: such as battery boxes for outdoor camping, installation in RVs, installations in yachts, etc. DC 12/24V power supply 3: The car charger function can charge mobile phones, for iPad and other electronic products 4: Power socket, which can be used with some car supplies for power supply 5: The voltmeter can observe the power condition of the power supply in real time. Product name:Power control box + 50A power cord 8AWG 30cm long Product input voltage:12/24V USB output:5V 4.8A (2.4A+2.4A) Cigarette lighter rated voltage and current:12V 20A/24V 10A Voltmeter measuring range:5-30V The overall aluminum body is sturdy and durable. With independent switch control and 20A overload protector protection. Product installation and fixation:Users can choose to fix the bracket in the RV or other suitable places for fixation, or they can choose not to fix it. Power supply mode:interface power supply Colour:Black Material:ABS Size:210x70x70MM Package contents: 1 * Power Box 2 * fixing accessories 8 * screws 1 * 30cm power cord Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.