Describe Wireless Display & Screen Extend:1. Wireless Display Is To Mirror A Small Screen To A Larger Screen Wirelessly.2. Wireless Extend Screen Is To Extend Laptop's Screen To A Second Screen Wirelessly.2 In 1. Supports To Cast Screen From All Devices With Usb C Interface Such As For Smart-Phones, Macbook, Tablet, Laptop, Pc. Best For Home Theater, Gaming, Meeting, Education, Live Broadcast, Speech Realize Breakthrough And Innovation: This Wireless Hd Transmitter And Receiver Kit Solves The Limitation On Encrypted Apps. Supports To Cast All Content(In Wireless Display Mode) - What You See On Your Small Screen, You See On Your Larger Screen Excellent Distance Transfer Performance - 0.07s Low Latency:The Wireless Hd Transmitter And Receiver Is Equipped With Powerful Long-Distance Signal Transmission, Provides A Stable Transmission With A Long-Distance Transmission Range Of Up To 170ft. Enjoy Stable Screen Mirroring And Screen Extending Great Gift For Wide Usage: Cast Your Phone Or Tablet To Tv Or Projector For Home Entertainment. Cast Laptop Or Pc To Projector Or Large Display For Presentation In Conference, Meeting, Education. Used For Business Meetings And Conferences, Electronic Sports Competition Site, Hall Exhibition Display, Livestream, Watching Movies, Watch Tiktok, Speech, Education, Demonstrating Teaching Courseware, Etc Package1 box USB Wireless Projection Screen Line