Over-current and Short Circuit Protection to ensure charging safety, meanwhile, built-in Smart IC ensures the circuit won't be burnt out if wrong wiring. IP66 waterproof grade. Cigarette Lighter Socket: Total Output Up to 120W(12V) / 250W(24V), it can charge camera, GPS device, seat heater, vacuum cleaner, humidifier, air pump, air purifier, etc. This USB installation socket builts in digital LED voltage monitor, displays the real-time accurate voltage status of your vehicle's battery, for preventing problems caused by low voltage, the light also makes quick and easy to find USB ports in the dark or at night. Dual USB Ports: Dual USB Charger Socket enable Charge Two Devices Simultaneously at Full Speed with 1A/2.1A in each USB port. With a Total Power of 3.1A, it Works for all USB-powered Devices. Smart Panel Car Charger: The surface of this product is designed in matte black, made of PC flame-retardant material, resistant to high current, high and abrasion resistance, and also effective in dust and water resistance. LED Color:Green Input voltage: 12-24V Output current: 5V 3.1A Cigarette lighter input voltage: 12V -24V Installation Precautions: Wiring method: The back of the charging base is marked with "+" and "-", and you can connect it to the positive and negative poles of the power supply. Installation method: firstly use a hole opener to put the product in, and then tighten it with a threaded fixing ring. Installation scope: The product is suitable for all cars, RVs, yachts, ships, and engineering vehicles with 12-24v voltage. Colour: black Material: PC Size: 10.5x4.3x5.3cm Package Contents: 1 * USB Socket Switch 4 * Screws 4 * Blue terminals Only the above package content, other products are not included. Note: Light shooting 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.