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. 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. 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 various environments, such as laboratories and studios. 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. 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., Weight: 0.9038952742 pounds, Manufacturer: Qusedwey