A stereo set or system with two identical speakers and audio source/amplifier in between.

Stereo Set

A set of large and small rocks or mountains standing next to each other, in round shapes.

Rocks Or Mountains

A round sun or full moon irradiating light with lines of aura circumscribing it.

A set square or a triangle shaped ruler with measurements on one side.

A sun or star shape with a human face looking to the side.

A busy and overworked manager or employee surrounded by charts, graphs, and notifications.