Can I play without student devices?
Yes. Press Present to play on the board. Team board is designed for one screen, and keeps each team's points on the board.
Updated
Any activity can be presented on the board, so the class can answer aloud, in pairs or in teams with one screen in the room. Team board's points last for the game: they aren't saved afterwards.
For quick classroom jobs, try the free tools: spin the wheel, the random name picker, the team maker and the classroom timer.