Topvision LED Projector with 100 inch simple projection screen.
BUILT-IN HIFI STEREO SPEAKER: High clear stereo speakers provide powerful, crystal sound. You can also hook up an external speaker with 3. 5mm audio output for better sound. To reduce the noise, we have equipped it with the latest dual-fan system for its even better performance and immersive audio experience. Power voltage: 100V-240V 50/60Hz.
HOW TO CONNECT TO A SMARTPHONE: When connecting with an iPhone, an extra Lightning to HDMI adapter is needed. When connecting with an Android phone, an extra Micro USB/Type C to HDMI adapter is needed. (Adapter is not included). No need to install any app, this phone projector can mirror display your phone screen.
This does NOT support Dolby sound. If there is no sound when playing videos like Netflix, turn off Dolby sound.(Settings > Display & Sounds > Audio > Dolby Digital Output > and then turn Dolby Digital Plus OFF)
The USB port only supports USB flash drive, NOT support cord connection and data transfer.