Abstract: Provided is a biochemical test chip including an insulating substrate, an electrode unit, a first insulating septum, a reactive layer and a second insulating septum. The insulating substrate has a first vent hole. The electrode unit is located on the insulating substrate. The first insulating septum is located on the electrode unit. The first insulating septum has an opening which exposes a part of the electrode unit. The reactive layer is located in the opening. The second insulating septum is located on the first insulating septum. The second insulating septum has a second vent hole. The first vent hole is at least partially overlapped with the second vent hole.

Abstract: A multimedia broadcasting system triggered by a charging operation includes a multimedia device and a power transmission device. The power transmission device includes a discharging connector and a control unit. When the multimedia device is connected to the discharging connector, the control unit transmits readable identification information to the multimedia device via the discharging connector to trigger the multimedia device to play digital content data corresponding to the identification information. Thus, by triggering the multimedia to play advertisements or music via a charging operation, the present invention achieves a novel multimedia broadcasting method.