Specifications: Rear with 15A fuse protection function. Presented with vehicle and marine labels, easy for DIY. Pre-wired for you to easily install in both 12V and 24V vehicle, yacht, ship, caravan, t more→ruck, etc. Switch panel for controlling universal electrical equipment in the vehicle: headlight, fog light, width light, car refrigerator switch, car vacuum switch, take electric for automobile external equipment, cigarette lighter and so on. Dual USB charging ports(DC 5V/2.1A, 5V/2.1A), charging your phones, tablets, cameras, GPS, wireless headphones, etc. 12V/24V Cigarette lighter can light your cigarettes. Digital voltage display helps to monitor vehicle's electrical safety from 5V to 30V.