Bell in a vacuum

 Inside a closed glass jar by the gradual depletion of air ringer sound fades, and finally die down.

On the plastic base a bell pumps is placed. Under this bell an electric ringer is placed powered by an 50 Watt 24V / 220V. Sound is vibration of air, or other media. And in a vacuum sound vibration does not travel, because there is nothing what can oscillate. Inside a closed glass jar by the gradual depletion of air ringer sound fades, and finally die down.

Accessories: single pump.

Material: glass, plastic

Dimensions: 60 x 40 x 40

21IQ-0074