... voltage from 12V to 240V Insulated heater for air-conditioner is a new kind of large power heater ... more security3. keep the stable power4. need the air blowing5. the air blowing velocity is 4 meter6. small sound7. longer ... .Insulated heater for air-conditioner used in the air-conditioner, cold/warm air-conditioner, Fan heater, hand toilet heater, hand dryer, disinecting cabinet, car air-conditioner.