This product comes with a resonance generator, an acrylic box with a small magnet, a USB data cable; Note: The acrylic shell may have a glue smell, which dissipate if you place them in the sun or a ventilated place for 2 to 3 days. It is recommended to remove the film before use. With an adjustable frequency range of 0.01 to 100000Hz, our sine wave generator allows you to set it according to your needs to improve efficiency and personalization; The default frequency is 7.83Hz, which can also be adjusted to 174Hz, 285Hz, 396Hz, 417Hz, 528Hz, 639Hz, 741Hz, 852Hz, 963Hz, etc. Our audio frequency generator resonator provides multiple waveforms, namely sine wave, square wave and reverse square wave, which are suitable for a range of applications and environments, such as laboratories and studios. The adjustable resonance generator can emit sine waves to create a relaxing environment, improve your state of mind, and enhance your sense of happiness; it is also a warm gift for friends and family on birthdays, Christmas and other festivals. The sound generator measures about 5.9 x 5.5 x 1.2 inches, and the acrylic box measures about 6.2 x 5.8 x 1.5 inches, which can cover the frequency generator well. Its small size and USB-powered design easy to carry and apply or during travel. Stable and reliable: The default frequency of the sine wave generator is 7.83Hz, the sine wave voltage amplitude is 3V, and the square wave voltage amplitude is 5V to the stability and accuracy of the output signal. Wide application: This adjustable frequency generator is very suitable for environments that require signal generation and frequency adjustment, such as electronic equipment testing, equipment calibration, and scientific experiments. Frequency range: 0.01 to 100000 Hz Default frequency: 7.83Hz Power supply voltage: 5V Sine signal voltage amplitude: 3V Square wave signal voltage amplitude: 5V Color: mainly green Dimensions: Frequency generator: about 5.9 x 5.5 x 1.2 inches Acrylic shell: about 6.2 x 5.8 x 1.5 inches Colour:As Shown Material:Metal+Plastic Package Contents: 1 x Adjustable sine wave resonance generator 1 x Acrylic shell 1 x USB data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.