USB sacred-frequency generator for sound wellness. Sine output 0.01 Hz to 100 kHz, LED display and keypad. Starts in Schumann 7.83 Hz mode on silent coils; 3.5 mm jack for 432 Hz, 528 Hz and solfeggio tones. $69 alone, $89 with speaker, $119 for a pack of 2. Free worldwide shipping from France, 14-day returns. Sold by NaturaFit LLC. Wellness use only, not a medical device.