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 any protective film before use. This device generates low-frequency electromagnetic signals; headphones are required to hear the output. Adjustable Frequency Range: 0.01 Hz to 100,000 Hz. The sine wave generator allows user-defined frequency settings for flexibility and customization. Default frequency is 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. Waveform Options: Supports sine wave, square wave, and inverted square wave outputs—suitable for laboratory, studio, and educational applications. Design & Portability: Compact dimensions—generator: approx. 5.9 x 5.5 x 1.2 inches; acrylic case: approx. 6.2 x 5.8 x 1.5 inches. USB-powered for convenient portability and use. Signal Stability: Sine wave output amplitude: 3 V; square wave output amplitude: 5 V. Designed for stable, accurate signal generation. Applications: Suitable for electronic testing, equipment calibration, educational demonstrations, and scientific experiments. Technical Specifications: - Frequency range: 0.01 Hz to 300,000 Hz - Default frequency: 7.83 Hz - Power supply: 5 V DC via USB - Sine wave amplitude: 3 V - Square wave amplitude: 5 V - Color: As shown - Materials: Metal + acrylic Package Includes: - 1 x Adjustable sine wave resonance generator - 1 x Acrylic case - 1 x USB data cable Note: Product color may vary slightly due to screen settings and lighting conditions. Dimensions are subject to a tolerance of ±1–3 cm.