How to connect? For Android System: 1. After turning on the projector, use the remote control to press the last button on the second row to adjust the product to the wired same-channel mode. 2. The APP download code will appear on the product. You can scan it to download or connect the USB data cable and the Android phone will automatically jump to the APP download page. 3. After downloading and installing, allow this APP to be used with this USB accessory. 4. If the connection fails for the first time, please pull it out and plug the USB again to connect For OS System: 1. After turning on the projector, use the remote control to press the last button on the second row to adjust the product to the wired same-channel mode. 2. After connecting the USB, turn on the same screen mode of the phone to connect.