Great Picture Quality With a true resolution of 1920x1080, the mini projector delivers sharp, clear images without any loss of detail. The portable projector also has a high brightness of up to 11000 lumens, ensuring bright and vivid display effects even in well-lit environments. With a high contrast ratio of up to 10,000:1, the outdoor projector delivers deep, rich blacks and brilliant whites for an immersive viewing experience. Pleasant Sound Effects & Bluetooth Function The projector's built-in high-fidelity dual 5W speakers are capable of producing deep bass and clear highs with a wide dynamic range to accurately reproduce the nuances of music and sound effects. The 5.1 surround sound system gives you a fully immersive audio experience that makes you feel like you are there. Plus, you can connect the phone projector to external speakers via Bluetooth for even better sound.