Features: * [Pure Sine Wave] Converts 72V DC to AC 220V household wall power supply with continuous 2000W output (4500W surge capability), equipped with 2 AC outlet, 1 LCD multi-function display and high current DC terminals. (Please ensure that the total rated power of the connected devices is ≤2000W). * [Sturdy and sturdy] Aluminum alloy casing provides advanced protection against drops and bumps. * [LCD Multi-function Display] LCD display shows real-time power, output voltage, input voltage, battery voltage, real-time power, etc. * [Wide Application] Ideal for gifts, charging TVs, washing machines, air conditioners, refrigerants, microwave ovens and high-power appliances. These can only run a handful of 220V loads without interference. It can also be used in cars or solar systems. * [Car to RV] With our car inverter, you can use most of the household appliances in the car in the open air, such as watching TV and playing games, giving you an experience like being in a RV.     Battery Usage Time Calculation: 1)The working time of inverter, it is depend on the battery power and load power. 2)Formula: Working time (hours)= Battery Capacity X Battery Voltage X 0.8X0.9/Load Power 3) For example, the battery of 12V 60AH is supplied to a 220V 100W bulb. The working time is = 12(V) X 60(AH) X 0.8 X 0.9/100(W)=5.18(hours) (Note: 0.8 is battery discharge coefficient, 0.9 is inverter conversion efficiency)   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).   NOTE:(Pure Sine Wave Inverter suitable for sensitive load appliances, such as refrigerators, air conditioners, coffee machines, bread machines, induction cookers, etc.)   CAUTION: 1. Tighten the Positive (+) and Negative (-) terminals when the car converter is in use. 2. If the converter is directly connected with the cigarette lighter. The highest output power must be under 120W. If higher than 120W,we strongly recommend you using the Crocodile Clips to a battery, because car cigarette lighter might not afford power over 120W. 3. The car converter suitable for DC72V and Car ONLY, not applied for DC 60V and airplane. 4. 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 connect to the battery first and then turn on the inverter switch. 5. It's normal for the inverter to become warm while you are using it. Please put the inverter on the flat surface The working place should keep dry, keep the inverter away from moisture or water. Do not put the inverter next to heat vents or other devices(between 0 Celsius degrees and 40 Celsius degrees). Try to keep the inverter not be shined directly by the sunshine.