AC Input range selectable by Switch, 115VAC range for US and CA;
Protections: Short circuit / Overload / Over voltage / Over temperature; Built-in cooling FAN ON-OFF control, RTH3 Reaches 50, FAN ON, Under 40, FAN OFF;
Voltage adjustable range: 21.6 ~ 28.8 VDC; Non-PFC, most economical models