Features:

Stable and reliable:
The schumann sine wave generator with a default frequency of 7.83Hz, and the sine wave voltage amplitude is 3V, while the square wave voltage amplitude is 5V, to ensure the stability and accuracy of the output signal.

Wide Application:
The adjustable frequency generator is ideal for various environments where signal generation and frequency adjustment are required, like electronic device testing, equipment calibration, and scientific experiments and so on.

Specifications:
Frequency range: 0.01 to 300000Hz
Default frequency: 7.83Hz
Power supply voltage: 5V
Sinusoidal signal voltage amplitude: 3V
Square waves signal voltage amplitude: 5V
Color: mainly green
Size:
Frequency Generator: about 5.9 x 5.5 x 1.2 inches
Acrylic case: about 6.2 x 5.8 x 1.5 inches

Package includes:
1 x Adjustable schumann sine wave resonance generator
1 x Acrylic case
1 x USB cable
1 x User manual

Notes:
Manual measurement, please allow slight errors on size.
The color may exist a slight difference due to different screen displays.