Picture: Plug the HDMI cable (male) to computer, notebook, etc., and connect the video cable (male) to VGA, HDMI (female) of the video converter box, connect the VGA, HDMI (male) cable to the projector, computer monitor, TV etc. to display the picture. Audio: Connect the speaker cable to the 3.5mm AUX audio connector to hear the sound. Power supply: Connect the USB cable to the power source such as computer, etc. Connect the Micro USB cable to the adapter box. 3 Months Warranty