Special DC model. Trim controller to manage air flow. Special double deck sound insulation, low noise, big flow and high pressure. Micro controlled, storage battery charges when AC power is plugged. Special battery protection can prevent battery from over charging and increases the battery life. Automatic switch on, if AC power is not supplied. Lasts about 8 hours on DC
After connecting, turn on the power with the controller and use the same to control the air flow
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