BT400 is our updated model which is a portable LED LCD projector. Native resolution is 800?480 support max resolution 1920x1080. Contrast ratio is 1800:1. Throw range is 38-120 inch.</br>The brightness of this mini size projector is 1800 lumens/140 ANSI lumens (US). The high color LED light source with vivid color display. Manual keystone and focus image reverse</br>Multi-function input HDMI USB AV VGA and SD Card; Connecting your PC Laptop DVD Player USB Disk to enjoy videos movies game or any other entertainments</br>Industry-leading Warranty: 1-Year Limited Parts and Labor 90-Days on Lamp Coincide with Amazon Return Policy</br>This small projector is not recommended for PPT or business presentation ideal for indoor or outdoor theater movies and video game. Recommend Using in Dark Environment</br></br>Product Description</br></br><b>Features: </b><br>1. Enhanced LED Technology 20% Brighter than ordinary LED enjoy sharp image in dark room. <br>2. Large screen experience relaxing your eyes from TV. <br>3. Supports projection size from 38 to 120 inches best projection distance is about 8 feet with image size 80 inches.<br>4. Keystone function ??15???? adjust the image manually with keystone?? avoid image distortion. <p><b>Warm tips: </b> <br>1. It only provides clear image in dark room. <br>2. To connect with PC?? Laptop?? please adjust the PC?? laptop display resolution