Description: Connectable devices: The projector is compatible with TF card, headset, USB drive, network set-top box, speak, hard disk, DVD. Built-in small speaker: ultrasonic welding technology small volume also has a good sound effect. Short-focus optical lens: focusing at a distance of 50cm add image distortion correction significantly improve the image uniformity. High speed screen does not smear: through a specific frame insertion algorithm, high-speed motion pictures such as ball games and car racing movies can be erased to keep the image quality delicate and shocking. Application: Specially designed for Christmas and Thanksgiving, home theater entertainment, home movie time, football/sports events, TV series and video games,business meetings, education and training, etc. Specification: Material: Plastic + Electronics Size: 110×90×50mm/4.33×3.54×1.97inch Imaging technology: TF-T LCD Physical resolution: 320*240 Source: LED Focusing: manual operation Projection distance: 50-300cm Screen aspect ratio:16/9-4/3 Input interface: AV, USB, TF, 5V-2A Output interface:headset Maximum resolution: 1920*1080 Light: 20000 hours Engine power: 18W(max) Adapter: 12V, 1.5A Sound: 4Ω /3W Package Includes: 1 Set Mini Miniature Projector (US) Note: 1. Please allow 1-3mm error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!