You will receive: This product includes a resonant generator, an acrylic housing with a small magnet, and a USB data cable. Note: The acrylic housing may have a glue odor; please place it in sunlight or a well-ventilated area for 2-3 days to dissipate. It is recommended to remove the protective film before use. This product emits low-frequency electromagnetic waves; you will need headphones to hear the sound. Frequency Adjustable: With a frequency range of 0.01 to 100,000 Hz, our sine wave generator allows you to customize the settings to your needs for greater efficiency and a personalized experience. The default frequency is 7.83Hz, and it can also be adjusted to 174Hz, 285Hz, 396Hz, 417Hz, 528Hz, 639Hz, 741Hz, 852Hz, 963Hz, etc. Multiple Waveforms: Our audio generator offers a variety of waveforms, including sine waves, square waves, and inverted square waves, suitable for various applications and environments, such as laboratories and recording studios. Promotes Pleasure and Relaxation: The adjustable resonant generator emits sine waves, creating a relaxing environment, improving your mental state, and enhancing your sense of well-being; it also makes a thoughtful gift for friends and family on birthdays, Christmas, and other holidays. Portable Size: The sound generator measures approximately 5.9 x 5.5 x 1.2 inches, and the acrylic case measures approximately 6.2 x 5.8 x 1.5 inches, providing excellent protection for the frequency generator. Its compact size and USB power supply make it easy to carry and use, especially suitable for travel. Stable and Reliable: The sine wave generator has a default frequency of 7.83Hz, a sine wave voltage amplitude of 3V, and a square wave voltage amplitude of 5V, ensuring the stability and accuracy of the output signal. Wide Applications: This adjustable frequency generator is ideal for various environments requiring signal generation and frequency adjustment, such as electronic equipment testing, equipment calibration, and scientific experiments. Frequency Range: 0.01 to 300,000 Hz Default Frequency: 7.83Hz Power Supply Voltage: 5V Sine Wave Signal Voltage Amplitude: 3V Square Wave Signal Voltage Amplitude: 5V Color: As shown in the picture Material: Metal + Acrylic Package Contents: 1 x Adjustable Sine Wave Resonator 1 x Acrylic Housing 1 x USB Data Cable This package only includes the above contents; other products are not included. Note: Light reflection and different monitors may cause the color of the item in the picture to be slightly different from the actual product. Measurement tolerance is +/- 1-3cm.