What size inverter do I need?The size you choose depends on the watts (or amps) you want to run (see the spec plate on the device or tool to find the power consumption). We recommend that you buy a larger model than you think you need (at least 10% to 20% more than your maximum load).1. This product is an improved sine wave inverter, not suitable for built-in motors, hair dryers, air conditioners, coffee machines, water pumps, induction cookers, refrigerators, microwave ovens and other equipment. Please ensure that the total rated power of connected equipment is ≤300W/500W-2. When using an on-board converter, tighten the positive (+) and negative (-) terminals-3. If the converter is directly connected to the cigarette lighter. The maximum output power must be less than 150W. If it's above 150W, we strongly recommend that you use an alligator clip battery, as car cigarette lighters may not be able to handle more than 150W.-4. Car converter is suitable for DC12V and car, not suitable for DC 24V and aircraft-5. Please do not put the inverter in the ON position before starting the car, it is easy to damage the inverter before connecting the battery. The correct operation is to connect the battery first, then turn on the inverter switch-6. It is normal for the inverter to heat up during use. For best use, place the inverter on a flat surface, and the workplace should meet the following conditions:1. Keep it dry, do not let the inverter come into contact with water or other liquids, keep the inverter away from moisture or water.2. Cool environment, the temperature is kept between 0 degrees Celsius and 40 degrees Celsius. Do not place the inverter near cooling holes or other equipment. Try not to let the sun shine directly on the inverter.Specification:Model: Y4-2/Y6-2Name: Vehicle Power Inverter 4000W/6000WInput voltage: DC 10.5V~15V,(When the battery voltage is lower than 10.5V, the inverter low voltage protection, when the battery voltage is higher than 15V, the inverter high voltage protection)Output voltage: 220VThe output frequency is: 50HzPeak power: 4000W/6000WRated power: 300W/500WOutput waveform: Modified sine wave.Product size: 20.5X11.7X5.8cmPacking size: 22*10*14.5cmWeight: 0.6kgPackage Included:1 power inverter2 battery clips1 cigarette lighter plug (gift)1 x English manual