A wireless conferencing system for wirelessly connecting a computerized device with a display device includes at least a data transmitter. The data transmitter includes a transmitter self-powered unit, a data transmission module electrically powered by the transmitter self-powered unit, and a computer interface communicatively lined to the data transmission module, wherein when the computer interface is configured for detachably connecting to the computerized device, the data transmission module is powered and ready for wirelessly transmitting data from the computerized device to the display device without consuming power of the computerized device.