Features: Experience precise frequency control with ddss signals generator featuring 0.01Hz 500kHz ranges, 15+ waveforms including schumanns waves, and portable design for applications. Generates sine, square, triangle, and schumanns resonance waves (7.83Hz) with 0.01Hz resolution, housed in ABS for lab, classroom, or fieldwork. for electronics engineers, educators demonstrating waveform principles, and wellness enthusiasts creating relaxation environments. Optimize circuit testing in workshops, physics demonstrations in schools, or enhances meditation spaces with grounding schumanns frequencies. Powerful, this multifunctional module delivers laboratory accuracy across 0.01Hz 100kHz (all waveforms) while maintaining field readies portability and simplicities. Specifications: Materials: ABS Size:140x80mm Set: Set1, Set2(optional) Package Includes: 1Set signals Generator note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.