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 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 hear the headphones. Multiple Waveforms: Our audio generator offer 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. Promote happiness and relaxation: The adjustable resonance generator emits sine waves, creating a relaxing environment that improves your mental state and enhances your sense of happiness; it is also a warm gift for friends and family on birthdays, Christmas and other holidays Adjustable frequency: 0.01 to 100,000 Hz adjustable frequency range, our sine wave generator allows you to set it according to your needs for 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. 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 or travel, Weight: 1.92463554726 pounds, Manufacturer: Xnuiasqe