1. You receive: This product is equipped with a resonance generator, an acrylic case with a small magnet, a USB data cable. Note: The acrylic case may have a glue smell, so it should be dissipated in the sun or in a ventilated place for 2 to 3 days. It is recommended to remove the film before use; this is a low-frequency electromagnetic wave, and you need to use headphones to hear it. 2. Adjustable frequency: 0.01 to 100,000 Hz adjustable frequency range, our sine wave generator allows you to set it according to your needs; the default frequency is 7.83Hz, which can also be adjusted to 174Hz, 285Hz, 396Hz, 417Hz, 528Hz, 639Hz, 741Hz, 852Hz, 963Hz, etc. 3. Multiple Waveforms: Our audio generator offers multiple waveforms, namely sine wave, square wave and reverse square wave, suitable for a range of applications and a variety of environments such as laboratories and studios. 4. The adjustable resonance generator emits sine waves, creating a relaxing environment that may affect your mental state. It is also a gift option for friends and family on birthdays, Christmas and other holidays. 5. Portable Size: The sound generator measures approximately 5.9 x 5.5 x 1.2 inches and the acrylic box measures approximately 6.2 x 5.8 x 1.5 inches, which covers the frequency generator well, and is compact in size and USB-powered design for easy carrying and application during travel. 6. The sine wave generator has a default frequency of 7.83Hz, with a sine wave voltage amplitude of 3V and a square wave voltage amplitude of 5V, contributing to the stability and accuracy of the output signal. 7. This adjustable frequency generator is suitable for environments that require signal generation and frequency adjustment, such as electronic equipment testing, equipment calibration, and scientific experiments. 8. Frequency range: 0.01 to 300000 Hz 9. Default frequency: 7.83Hz 10. Power supply voltage: 5V 11. Sine signal voltage amplitude: 3V 12. Square wave signal voltage amplitude: 5V 13. Colour: As Shown 14. Material: Metal+Acrylic 15. Package Contents: 1 x Adjustable sine wave resonance generator, 1 x Acrylic case, 1 x USB data cable. Only the above package content, other products are not included. 16. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.