In one embodiment, a method is provided for providing power to a radio-frequency component capable of operating under multiple communication standards, wherein each standard has a respective operating frequency. A separation section on the feed side of the divided wall column separates the feed in a vapor comprising the first and second component, and a liquid comprising the second and third component. Here, the jet nozzle, the jet pump and the fuel inlet pipe are grounded via the sub tank without individual wiring member. Where the average droplet volume is determined to be not acceptable, an existing droplet dispensing parameter is changed to a new droplet dispensing parameter that will cause the average droplet volume for that droplet set to change. Because resonance space can be enlarged without increasing a size of the speaker bracket, an entire thickness of the mobile terminal can be reduced and thus a size and thickness of the mobile terminal can be decreased. The method includes sensing space temperature, comparing the space temperature with a setpoint temperature, and controlling the airflow control device to set the flow rate of the supply air based on the comparison.