Also supports 4K video. A new lamp based on the latest R&D provides 80% more brightness than other portable projectors. Excel/Word/PPT playback is via USB. Wireless Connectivity: 5G WiFi；BT 5.0. 🔔【4P/Auto Vertical Keystone&100%-50% Zoom】 The 100%-50% zoom adapts to different screen sizes and adjusts the image without distorting it.The video projector has a diffuse reflection that is very protective of the eyes,and uses a low-consumption LED lamp.