1. High Temperature Warning Indicator in LED display: When high temperature over 60 Celsius, the symbol of temperature will light up and show red color, plus audible alarm then shutdown. 2. Show Battery Power in LED display: Green means full power, yellow means half level, and red means low power of your battery, you have to recharge the battery at once. 3. High Voltage warning in LED display: (1) When high voltage warning, the symbol of v lights up(Red), battery level bar flickers, input voltage display shows 15V or more, plus audible alarm then shutdown. (2) When low voltage warning, the symbol of v lights up(Red), battery level bar flickers, input voltage display shows 10.5V or less, plus audible alarm then shutdown. 4. Power on/off indicator in LED display: The symbol show green means working normal, show red and faulty means without output. 5. Over load Short circuit in LED display: When overload, the symbol (like a balance scale) will light up(Red), load level bar flickers, no outputs audible alarm. When Short circuit warning, the symbol (like a balance scale) will light up(Red), load level bar flickers, no outputs audible alarm. 6. MCU LED Display: Car inverter has the micro-control unit LED realizes the exchange of human-machine information, and can know the working status of the inverter in real time, including show real time of input voltage, output voltage, output frequency, battery power, load, Power on/off indicator and other information. 7. Fast Charging Dual USB ports: One AC Outlets and two USB ports can offer fast charging for Mobile phones, computers, laptop, breast pump, Nebulizer, Razors, fan, camera, DVD players, lights, medical rescue device, emergency equipment etc, can be as a Emergency Power Supply. AC outlets great for laptop, drone, fan, camera, CPAP machine, game console, kindle, TV, DVD players, lights, iPad, RV, and other electronic devices.