Stable and Reliable - Ensures stable frequency output with default 7.83Hz and voltage amplitudes of 3V for sinusoidal and 5V. Multiple Waveforms - Provides sinusoidal, and inverted options for versatile applications. Promote Relaxation and Well Being - Emits a sinusoidal that creates a relaxing environment. Advanced Specifications - Powered by a USB interface and boasting a frequency of 7.83Hz, our Schumann Generator is less than 1W of rated power, which ensures efficient utilization of energy. Compact and Convenient - Compact size of 10.2x8.1cm and USB powered for easy carrying and use at home or while traveling.<br><br>For the bedroom To help sleep soothe the nerves, treatment of insomnia. For the office Relax and improve work efficiency. For the leisure time Resting body and mind. Colour:As Shown Material:pcb<br><br>Package Contents: 1 * Pulse Generator(Not a finished product, needs assembly)<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.