Feature

●The buzzer is 92 dB while standing still, when spun a student can easily hear the shift in frequency
●Buzzer housing has a simple on/off switch and is constructed of rugged ABS plastic
●Nylon cord is 28" attached to a rugged ABS handle 8.5in long, 1in diameter)
●Battery not included


Description

The perfect demonstration of the Doppler effect in a classroom (with caution of course). Swing the Doppler effect apparatus and students will be able to hear the change in frequency. Battery not included.