Feature: The projector is built-in high-quality speaker offers high-fidelity, accurate sound reproduction for any multi-media listening experience, movies, music or games! The projector 3.5mm Audio jack is capable of connecting external speakers. Max up to 105 inches big image, presenting vivid details with high resolution 320*240 native, with1000:1 High Contrast, give you crisp, clear and sharp images! Projector Simple Installation & Operation: The projector offer 3 kinds of projection methods: Ceiling/ Front/ Rear. The user interface is concise, you can select the corresponding modes depending on the connected device, and play.