Barco ClickShare is a wireless click to share group collaboration system for your conference room meetings and presentations at an affordable price. The system consists of a base unit that plugs into your display, and buttons that plug into your USB port that you can click to gain priority and share your content. There are three systems, the CSC-1, CSE-200, and the CS-100. The smaller unit is the CS-100 which allows up to 8 simultaneous connections, The CSE-200 allows up to 16 users, and the larger CSC-1 allows up to 64 simultaneous connections. The CSE-200 adds airplay, enhanced security, and 2 users on 1 screen versus the CS-100. The CSC-1 adds dual display capabilities, 4K resolution, and the ability for up to 4 people to be on 1 screen at once. The CS-100 comes with 1 button, the CSE-200 comes with 2 buttons, and the CSC-1 comes with 4 buttons. If you need help selecting the correct ClickShare product let Conference Room AV help.