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 waveform that creates a relaxing environment. Advanced Specifications - Powered by a USB interface with a frequency of 7.83Hz, this device has less than 1W of rated power for efficient energy use. Compact and Convenient - Compact size of 10.2x8.1cm and USB powered for easy portability and use at home or while traveling. Ideal for bedroom use to help support sleep and soothe the nerves. Suitable for office environments to promote relaxation and improve focus. Perfect for leisure time to help rest the body and mind. Color: As Shown Material: PCB Package Contents: 1 x Pulse Generator (Not a finished product, requires assembly) 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 to appear slightly different from the actual item. Measurement allowed error is +/- 1-3cm.