Abstract: An idling fan includes a blade fan mounted on an eccentric shaft of a vibrating motor in an electronic device, such as a controller for a TV game. The blade fan rotates along with the eccentric shaft to produce airflows when the vibrating motor is actuated, and the produced airflows quickly carry away heat generated by the electronic device during operation thereof.

Abstract: A multi-linguistic wireless spread spectrum narration service system includes a speech database, a plurality of basestation units, and at least one mobile unit. The speech database is stored with multi-linguistic narration service speech messages. The plurality of basestation units are arranged at each exhibition section of an exhibition field. Each basestation unit controller captures narration service speech messages from the speech database and a wireless communication is performed. The mobile unit controller is provided to be worn by a visitor. The mobile unit detects the wireless signals of a specific basestation unit. Thus, a synchronous or asynchronous connection is built through the spread spectrum radio frequency processing and baseband processing module. Therefore, the narration service speech message from the basestation unit is received.