Features: 1. Dual LCD digital display allows you to keep the output voltage and battery voltage value at any time. The sensitive issue of inverter protection when starting soluble electrical appliances. 2. The low-power non-professional user market has added a positive and negative feedback protection function. 3. Intelligent control oil seal fan. , more energy-saving and quieter. 4. Digital MCU control, output waveform, more accurate frequency, accurate output voltage, fast response of the protection circuit. In automobiles, ships, mobile post and telecommunications, public security, emergency and other fields. -15.5V output voltage: 110V/220V (optional) output voltage range: 110V 10% / 220V 10% frequency: 9.5V 50Hz / 60Hz high voltage protection: maximum protection voltage 15.5V Load protection: Yes Output short circuit protection: Yes Positive and negative polarity reverse protection: Yes Regulated output: Yes Buzzer: Yes USB interface: 2.1A x 2 Input terminal connection method: