Examlex
Which of the following is NOT a primary consideration when selecting a presentation aid?
Solenoid
An electromagnetic device that converts electrical energy into mechanical action, often used for remotely controlling switches or valves.
Heater
A device used to generate heat for various purposes, such as warming a room or heating water.
Horn
A device that emits a loud sound for signaling or warning purposes.
LED Status Indicator
A light-emitting diode used to display the operational state or condition of a device or system.
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