<b>WHY CHOOSE THE PROJECTOR?</b><br><br>We are a self-developed factory and direct supply to reduce the difference earned between dealers. The projector 720p mini projector is a super portable big screen that can project huge images of more than 210 "anywhere.With a native resolution of 1080*720P, And the real dynamic contrast is 4000:1. Most projectors exaggerate the contrast. Its performance is 3 times better than 480p. We provide our customers with the best quality projectors and devote ourselves to improving the performance to satisfy customers. Every projector has to undergo strict inspection before delivery. No matter what problems you encounter. You can always get professional solutions from Customer Service Center. Please rest assured that we also have 3 year Money Back Warranty.<br><br><b>CONTACT US: </b><br><br>Login your amazon account > choose "Your orders" > find the order ID > click "Contact seller"<br><br><b>WARM TIPS:</b><br>1. Dolby sound is not supported. If there’s no sound, please turn off Dolby Digital in your device.(Settings > Display & Sounds > Audio > Dolby Digital Output > and then turn Dolby Digital (OFF);<br>2.When connect with iPhone, you need an extra Lightning to HDMI adapter (not included).When connect with android phone, an extra MHL-HDMI adapter (not included) is required. (Note: Android phone need to support MHL function)