1. Newly designed, short-focus optical lens, which can focus at a distance of 50CM, and increases image edge distortion correction to improve image uniformity.2. Built-in small cavity, ultrasonic welding process, small size and loud effect. This product is a projector, using LED light source, diffuse reflection imaging indirect light source, let the child turn on, parents can rest assured.3. Wireless co-screen mobile version The operation is simpler than the wired co-screen method. For example: compared with our YT200, there is no need to be bound by wires, and Android phones do not need to download the same-screen APP.4. It can be played wirelessly on a laptop computer (WIN10 or above systems, including WIN10, WIN11), plug in a USB flash drive, play on a mobile hard disk, and play wirelessly on an Apple phone or Android phone5. Supported resolution: 1920*1080 MaxFeature:Product name: Mobile Phone ProjectorSize: 101 x 78 x 40mm;Color: blackImaging technology: TFT LCD;Physical resolution: 320 x 180;Light source type: LED;Focus: Manual;Aspect ratio: 16:9Input port: AV, USB, TF, 5v-2a;Output port: headphone;Support resolution: 1920 x 1080;Light source life: 30,000 hours;Power: 10W (max);Operation mode: manual/remote control;Projection size: 14-100 inches;Speaker: 42W;Packing Included:1 x YT100 Home Mini Portable Mini Projector1 x USB cable1 * User ManualNote:1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.