Features: 1. Dual LCD digital display allows you to keep the output voltage and battery voltage value at any time. 2. Fault prompt function. In addition to different sound prompts it can also be displayed more intuitively from the display (such as battery undervoltage battery overvoltage overload high operating temperature output short circuit etc.). 3. The product adds the function of overload delay closing which solves the problem of sensitive inverter protection when soluble electrical appliances are started. 4. The positive and negative fallback protection function is added to the low-power non-professional user market. 5. Intelligent temperature control oil seal fan. Inverter can work under certain temperature more energy efficient and quieter 6. Controlled by digital microcontroller the output waveform and frequency are more accurate the output voltage is accurate and the protection circuit responds quickly. Description: 1. This is a power inverter with STM chip technology and multiple intelligent protection with high reliability. 2. Widely used in automobile ship mobile post and telecommunications public security emergency and other fields. Output waveform: Corrected sine wave Actual power: 300W Peak power: 600W Input voltage: 12V Input voltage range: 9.5V -15.5V Output voltage: 110V/220V (optional) Output voltage range: 110V10%/220V10% Frequency: 50Hz/60Hz Inverter Efficiency: 0.9 Circuit Topology: Push Encourage No-load Current: 0.7A Low Voltage Protection: Minimum Protection Voltage 9.5V High Voltage Protection: Maximum Protection Voltage 15.5V Negative Reverse Protection: Yes Output Voltage Stability: Yes Buzzer: Yes USB Interface: 2.1A x 2 m/3.98in x 78mm/3.04in Package Information: Package Dimensions: 220x100x145mm/ 8.58 x3.9x5.66 inches Package Weight: 650g/1.43lbs Normal box includes: 1 Power Inverter 1 Alligator Clip 1 Cigarette Lighter