The device has various connection options from left to right: Headphone Port: To connect external speakers or headphones. AV Port: To connect old devices via the three-color cable. Memory Card Port (SD/TF): To play files directly from the memory card. HDMI Port: To connect computers, PlayStations, TVs, or smart streaming devices. USB Port: To play movies and pictures from a flash drive. VGA Port: To connect old desktop and laptop computers. Box Contents (Fourth Picture) The main projector device. Main power cable (electricity). AV conversion cable (from a small head to 3 colors: red, white, yellow). Basic Operation Method Electricity: Connect the power cable to the back or side of the device and the power source (supports 100-240 volts). Power On: Press the power button (Power) located on top or via the remote if available. Display Source: Connect your device (e.g., computer via HDMI cable) then press the S (Source) button and select the port you used. Focus Adjustment: Use the silver wheel near the lens (Focus) to move it left and right until the image is perfectly clear on the wall. Price 150