... or aluminous case 3.Fan cooling Key Features1.High frequency design2.Modified sine wave inverter with charger3.Automatic ... option (HICM Mode)5.Small and light, high efficiency6.Full Protection for Over Temperature, Over Load ... cooling fanyes Running Temperature-20 to 40 degree High temperature protectionYES,60°C-70°C Short ... only removed the auto transfer function. High Frequency HOME UPS HIC500W-2000W