Usage Tips: You receive: This product includes a resonance generator, an acrylic case with a small magnet, and a USB data cable. Note: The acrylic case may have a slight odor, which will dissipate naturally when placed in sunlight or a well-ventilated area for 2–3 days. It is recommended to remove the protective film before use. This device generates low-frequency electromagnetic signals; headphones are required to hear the output. Adjustable Frequency: Frequency range: 0.01 Hz to 100,000 Hz. Default frequency: 7.83 Hz. Other preset frequencies include 174 Hz, 285 Hz, 396 Hz, 417 Hz, 528 Hz, 639 Hz, 741 Hz, 852 Hz, and 963 Hz. Multiple Waveforms: Supports sine wave, square wave, and inverted square wave outputs. Suitable for laboratory, studio, and educational applications. Portable Design: Device dimensions: approx. 5.9 x 5.5 x 1.2 inches. Acrylic case dimensions: approx. 6.2 x 5.8 x 1.5 inches. Compact, USB-powered design for easy transport and use. Signal Specifications: - Frequency range: 0.01 Hz to 300,000 Hz - Default frequency: 7.83 Hz - Power supply voltage: 5 V - Sine wave output amplitude: 3 V - Square wave output amplitude: 5 V Materials: Metal housing + acrylic case Package Contents: - 1 x Adjustable sine wave resonance generator - 1 x Acrylic case - 1 x USB data cable Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.