1MHz Function Generator, Features: Sine; Square and Triangle Wave Generator 1Hz - 1MHz Sine Wave Distortion Less Than 1% Square Wave Symmetry Less Than 1%, Runs on a 9V battery
Doppler Effect Demonstration Apparatus, 92dB buzzer, 0.8m tether. Nylon cord is 2ft 8in attached to a rugged ABS handle 8.5in long, (1in diameter), Swing the apparatus and students will be able to hear the change in frequency, Dimensions: 4.5 x 5 x 3 in