Features: Made with quality plastic, this waves generator ensures excellent frequency stability at the default 7.83Hz while maintaining precise signals output for consistent performances. Features advanced technology allowing frequency adjustment from 0.1Hz to 30KHz, offering customizable option for various needs beyond the standard resonance. Supporting sine, square, and inverted square waves for flexible application requirements. Equipped with crystal oscillator frequency reference for enhanced stability and superior resistance to interferences during operate. Easily powered via power banks, USB chargers, or other 5V devices with low energy consumption (<1W). Specifications: Component: Plastic Antenna waveform: sine waves Interfaces waveform: sine waves Supply voltages: 5V Default frequency:7.83Hz Adjustment ranges: 0.1Hz~30000Hz Sinusoidal signals voltages amplitude: 3V Square waves signals voltages amplitude: 5V Circuit board size: about 150x100mm/5.91x3.94in Size with shell: about 155x105x28mm/6.1x4.13x1.1in Package Includes: 1 Set Resonance Waves Generator note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.