Wireless clicker

[3] It consists of a transmitter similar to a remote control and a small receiver, usually connected to a USB port on the computer, that detects it as if it were a mouse.

The range of devices operated by radio is usually specified between 10 and 15 meters, in fact if it is at the coverage limit, the orientation of the pointer and therefore of the antenna printed on the PCB may be critical.

Using a wireless clicker, helps the presenter to move freely, instead of being obliged to stay next to the computer, can get closer and keep in touch with the audience, watching the presentation together with them, being able to use the built-in laser pointer, in order to emphasize specific points in the dialogue with the participants.

[9] This makes interactive learning possible and minimizes some negative characteristics of face-to-face teaching.

[11] One can remember the case of The Caine Mutiny, when Captain Queeg is questioned,[12] he tries to calm down by moving in his hand, a pair of steel Baoding balls.