Material: Made of premium ABS, nylon, aluminum foil, strong and durable. With waterproof, flame-retardant caps and excellent resistance to high and low temperatures. LED indicator: The voltmeter is built into the center of the USB charger, clearly displays current working volt readings, easily note the voltage status of vehicles. Easy Installation: Pre-wired for easy installation. You just need to fix it to the hole with screws, then the LED panel can be installed horizontally or vertically. Multiple protection: with output short circuit protection, overload protection, overload protection reverse polarity and multiple protection, safer to use, very convenient for driving. Wide compatibility: This power outlet is suitable for cars, boats, boats, motorcycles, ATVs, RVs, etc. 12-24V. Suitable for charging mobile phone, GPS, digital camera, etc. Note: The data is all manually measured, please allow 1-3cm error due to Light and display differences, there may be color differences, please refer to the actual item received.