FRIENDLY REMINDER:
1. T21 Projector is mainly used for home cinema and video games, NOT recommended for Powerpoint, Word, Excel, or business presentation. For all home projectors, It will perform the best effect if under a relatively dark room environment.
2. 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)