Features特征 1,Pure sine wave output (THD < 3%) R Load **弦波输出(THD<3%)R负载 2,Output frequency : 50 / 60Hz switch 输出频率:50/60Hz开关 3,Loading & Temperature controlled cooling fan 加载和温控冷却风扇 4,Advanced microprocessor 先进微处理器 5,Protection: 保护 Input Undervoltage 输入欠压 Input Overvoltage 输入过电压 Overload **载 Short circuit 短路 Low battery alarm 电池电量低报警 Over temperature **温