If you want to give presentations anywhere, the Acer K137i is the thing for you. This compact projector only weighs 510 grams and comes with a convenient carrying bag, so you can easily bring it to the office. Feel free to leave your laptop at home, because the projector has WiFi and an integrated media player. If you connect a USB flash drive or external hard drive, you can send your saved videos or presentations to the big screen. Thanks to the integrated WiFi receiver, the projector can stream images from your smartphone or tablet.