Features: Brand new and high quality Immerse yourself in a wide ranges of frequencies with our frequency modulation signal device. Discover the power of precise and accurate signal generation for relaxation and tranquility. Crafted with high quality materials, our signal device ensures durability and stability for long term use. Experience advanced technology in signal generation. Designed for all individuals, our signal device is perfect for those seeking to improve their overall. Whether you're looking to unwind after a busy day or enhances your meditation practice, this product is suitable for you. Create a peaceful atmosphere in any setting with our versatile signal device. Simply connect it to your computer or other devices and enjoy the calming frequencies. Perfect for home, office, or even while traveling. Elevates your self care routine with our unique signal device. Treat yourself or surprise your loved ones with this device that brings relaxation into your life. Specifications: Material: PCB Package Includes: 1PC Schumann Waves Generators note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!