Abstract: The present invention relates to a hub structure having a charging function. The structure is a combined structure formed by integrating a conventional charging holder/device and a hub so as to provide the direct current to a wireless mouse, wireless indexer, wireless keyboard, or wireless device of the general computer. This will avoid the trouble of installing or replacing the battery of the wireless peripheral device for the computer. Besides, each of the wireless keyboard, the wireless mouse and the wireless device has to be provided with a receiving device to be connected to the computer. Therefore, the present invention is used for being connected to the wireless keyboard and the wireless mouse so as to reduce the cost, promoting the efficiency and provide the convenience to the consumer.

Abstract: The present invention provides a MP3 voice recording/playing device. Instead of comprising a memory module, the MP3 voice recording/playing device according to the present invention is connected to an external storage device so as to avoid the complicated process. The user has not to install the driver of the MP3 voice recording/playing device in the computer and has not to connect the MP3 voice recording/playing device to the computer via a transmission line in order to download the music. Therefore, the present invention can greatly reduce the cost and promote the efficiency.

Abstract: The present invention relates to an indexer structure combined with a card-reading device. The structure is made by combining an indexer and a card-reading device so as to form a unity. Therefore, the two separately operated structures are combined to be an indexer provided with a card-reading device. By inserting or closely inducing a card in a contact or non-contact mode, the combined structure not only has the function of an indexer, but also the functions of card-reading identification, accessing or security shelter. This omni-functional structure can be employed in different applications and promote the convenience of usage.