Riiai Frequency Generator: Schumann Wave Generator for Healing, 0.001Hz‑200kHz Portable Signal Generator with Rechargeable Battery, Color Screen, Multiple Waveforms for Sleep Aid, Mood Relief

["【1000mAh Rechargeable Battery】1000mAh rechargeable battery lets you use this frequency generator cord-free anywhere; Perfect for your bedside, travel, or daily home use—no messy cables holding you back","【Schumann Wave for Better Sleep / Mood】Built-in Schumann resonance mimics the Earth’s natural 7.83Hz frequency to gently calm your nervous system; It helps ease stress and anxiety, so you can relax more fully and enjoy deeper, more restful sleep","【Easy Operation with Color Screen】Designed for simple, hassle-free use—clear buttons and a bright color screen clearly show frequency, waveform, and battery level; Easy to navigate for everyone, no complicated setup required","【0.001Hz–200kHz Wide Frequency Range】With a broad frequency range from 0.001Hz to 200kHz, it meets most daily and light professional needs; Stable output and high precision ensure consistent, dependable performance every time","【Multiple Waveforms for Versatile Use】Choose from sine, square, triangular, and other waveforms to match your needs; Ideal for relaxing at home, unwinding after work, or light personal wellness routines"]