Features: [12V Power inverter] Car power inverter with 2 USB ports and AC outlet. The power inverter comes with free cigarette lighter and 2pcs battery clips, providing 300Watt/500Watt continuous power inverters to choose. [LED Battery Display] Battery Level Bar for LED Display shows the battery Capacity, which can remind you that when your battery no power. When connect the battery with inverter, this LED Screen work and show the real-time capacity of battery. It has 5 level (lattice) of the Battery Level Bar, and each lattice represents 20% of the battery power. When your battery is no power, the display will flash to remind you that you need to charge your battery. [Fast Charging Dual USB ports] One AC Outlets and two USB ports can offer 100% fast charging for Mobiles phones, computers, laptop, breast pump, Nebulizer, Razors, medical rescue device, emergency equipment etc, can be as an Emergency Power Supply. [Multi Protection] Built-in fuses, safe charging design and cooling fan prevents the car power converter from over-heat, saving power and energy. Over voltage, overload, over-current, short-circuiting, under-voltage, overheating, short circuit protection. [Lightweight design &Top Quality] Lightweight and compact, ideal for vacations, camping and work trips. It can be plugged into almost any 12V power output vehicle, providing charging opportunities anywhere. [What you get] car power inverter, user manual, 2 x Battery Clamp, 1 x Car Cigarette Plug. Specification: Power: 300W, 500W (Optional) Peak Power: 600W (300W), 1000W (500W) Input voltage: 12V Input voltage range: 9.5V-15.5V Output voltage: 110V/220V Output voltage range: 110V10% / 220V10% Frequency: 50Hz/60Hz Inverter efficiency: 90% Circuit topology: pushing No-load current: 0.7A Low voltage protection: Yes, the minimum protection voltage is 9.5V High voltage protection: Yes, the highest protection voltage is 15.5V Overload protection: Yes Output short circuit protection: yes Output voltage regulation: yes Protection buzzer: no USB interface: 2.1A*2 Input wiring method: terminal Output interface: international general socket Chassis color: blue + black Product size: 203*110*56mm Product Weight:500g (300W), 700g (500W) CAUTION! -1. This is a modified sine waves inverter, NOT applicable for devices which work by built-in motor, hair dryers, air conditioners, coffee machine, water pump, induction cooker, refrigerators and microwave ovens etc. Make sure that the total rated power of the connected devices is 400W -2. Tighten the Positive (+) and Negative (-) terminals when the car converter is in use -3. If the converter is directly connected with the cigarette lighter. The highest output power must be under 150W. If higher than 150W,we strongly recommend you using the Crocodile Clips to a battery, because car cigarette lighter might not afford power over 150W. -4. The car converter suitable for DC12V and Car ONLY, not applied for DC 24V and airplane -5. Please do not leave the inverter in the ON position before car start. It's easy to damage the inverter before connected to the battery. The correct operation is connected to the battery first and then turn on the inverter switch -6. It's normal for the inverter to become warm while you are using it. In order to get the best using results, please put the inverter on the flat surface The working place should meet the following criteria: 1. Keep dry, should not let the inverter contact the water or other liquids, keep the inverter away from moisture or water. 2. Cool environment, keep the temperature between 0 Celsius degrees and 40 Celsius degrees. Do not put the inverter next to heat vents or other devices. Try to keep the inverter not be shined directly by the sunshine.What Size Power Inverter Do I Need The size you choose depends on the watts (or amps) of what you want to run (find the power consumption by referring to the specification plate on the appliance or tool). We recommend you buy a larger model than you think you'll need (at least 10% to 20% more than your largest load). Package List: 1 x Power Inverter 2 x Battery Clip 1 x Cigarette Lighter Plug (gift) 1 x English Manual