... features·Buzzer alarm·Suitable for most electronic products with AC input·3 year warranty2.2 Applications·Home appliance: Dust ... Air compressor, etc.·Office and portable equipments: Computer, Printer, Monitor, Copier, Scanner, Digital camera& video camera, etc.·Entertainment equipment ... LED indicators when inverter is faced with abnormal conditions.5.1 Input protection5.1.1 Battery polarity protection: ...