Usage Tips:1Hz-500kHz DDS signal generator with Schumann resonator: Combines the functions of a high-frequency signal generator and a 7.83Hz Schumann resonator to provide electronic circuit testing with stress-relieving benefits, setting it apart from standard models. Versatile waveform generation: Produces sine, square, triangle, and sawtooth waveforms. Includes a switchable filter for precise sine and pulse outputs, perfect for oscilloscope calibration and testing audio amplifiers. Dual power options: Compact and portable, powered via AC/DC adapter or battery for use in classrooms, labs, or field testing. Complete package with Schumann resonator: The included Schumann resonator enhances mental relaxation while offering reliable performance for engineers and audiophiles alike. High accuracy & stability: Built with quality pulse chips, accurate resistors, and correction capacitance for stable frequency generation. Features a user-friendly Type-C interface for easy connectivity. Colour:As Shown Material:Composite Materials Package Contents: 1 * Signal Generator kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.